4142781 has 12 divisors (see below), whose sum is σ = 6336252. Its totient is φ = 2599296.

The previous prime is 4142767. The next prime is 4142791. The reversal of 4142781 is 1872414.

It can be written as a sum of positive squares in 2 ways, for example, as 3348900 + 793881 = 1830^2 + 891^2 .

It is not a de Polignac number, because 4142781 - 2¹¹ = 4140733 is a prime.

It is a super-2 number, since 2×4142781² = 34325268827922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4142701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13386 + ... + 13691.

It is an arithmetic number, because the mean of its divisors is an integer number (528021).

Almost surely, 2^4142781 is an apocalyptic number.

It is an amenable number.

4142781 is a deficient number, since it is larger than the sum of its proper divisors (2193471).

4142781 is a wasteful number, since it uses less digits than its factorization.

4142781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27100 (or 27097 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 4142781 is about 2035.3822736774. The cubic root of 4142781 is about 160.6068232294.

The spelling of 4142781 in words is "four million, one hundred forty-two thousand, seven hundred eighty-one".