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4142881 = 14392879
BaseRepresentation
bin1111110011011100100001
321210110222001
433303130201
52030033011
6224444001
750133241
oct17633441
97713861
104142881
11237a676
121479601
13b20912
1479bb21
1556c7c1
hex3f3721

4142881 has 4 divisors (see below), whose sum is σ = 4147200. Its totient is φ = 4138564.

The previous prime is 4142863. The next prime is 4142891. The reversal of 4142881 is 1882414.

4142881 is a nontrivial binomial coefficient, being equal to C(2879, 2).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1882414 = 2941207.

It is not a de Polignac number, because 4142881 - 27 = 4142753 is a prime.

It is a super-2 number, since 2×41428812 = 34326925960322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4142891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 2878.

It is an arithmetic number, because the mean of its divisors is an integer number (1036800).

Almost surely, 24142881 is an apocalyptic number.

4142881 is the 2878-th triangular number.

4142881 is the 960-th centered nonagonal number.

It is an amenable number.

4142881 is a deficient number, since it is larger than the sum of its proper divisors (4319).

4142881 is a wasteful number, since it uses less digits than its factorization.

4142881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318.

The product of its digits is 2048, while the sum is 28.

The square root of 4142881 is about 2035.4068389391. The cubic root of 4142881 is about 160.6081154816.

The spelling of 4142881 in words is "four million, one hundred forty-two thousand, eight hundred eighty-one".

Divisors: 1 1439 2879 4142881