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42969 = 314323
BaseRepresentation
bin1010011111011001
32011221110
422133121
52333334
6530533
7236163
oct123731
964843
1042969
112a313
1220a49
1316734
1411933
15cae9
hexa7d9

42969 has 4 divisors (see below), whose sum is σ = 57296. Its totient is φ = 28644.

The previous prime is 42967. The next prime is 42979. The reversal of 42969 is 96924.

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.

It is not a de Polignac number, because 42969 - 21 = 42967 is a prime.

It is a super-2 number, since 2×429692 = 3692669922, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (42961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7159 + ... + 7164.

It is an arithmetic number, because the mean of its divisors is an integer number (14324).

242969 is an apocalyptic number.

It is an amenable number.

42969 is a deficient number, since it is larger than the sum of its proper divisors (14327).

42969 is a wasteful number, since it uses less digits than its factorization.

42969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14326.

The product of its digits is 3888, while the sum is 30.

The square root of 42969 is about 207.2896524190. The cubic root of 42969 is about 35.0255595613.

The spelling of 42969 in words is "forty-two thousand, nine hundred sixty-nine".

Divisors: 1 3 14323 42969