42162981 has 24 divisors (see below), whose sum is σ = 65729664. Its totient is φ = 23970240.

The previous prime is 42162971. The next prime is 42162997. The reversal of 42162981 is 18926124.

It is not a de Polignac number, because 42162981 - 2⁶ = 42162917 is a prime.

It is a super-2 number, since 2×42162981² = 3555433933612722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42162961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33636 + ... + 34866.

It is an arithmetic number, because the mean of its divisors is an integer number (2738736).

Almost surely, 2^42162981 is an apocalyptic number.

It is an amenable number.

42162981 is a deficient number, since it is larger than the sum of its proper divisors (23566683).

42162981 is a wasteful number, since it uses less digits than its factorization.

42162981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1474 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 42162981 is about 6493.3027805578. The cubic root of 42162981 is about 348.0517081970.

The spelling of 42162981 in words is "forty-two million, one hundred sixty-two thousand, nine hundred eighty-one".