42064981 has 12 divisors (see below), whose sum is σ = 49527072. Its totient is φ = 35617848.

The previous prime is 42064973. The next prime is 42065011. The reversal of 42064981 is 18946024.

It is not a de Polignac number, because 42064981 - 2³ = 42064973 is a prime.

It is a super-2 number, since 2×42064981² = 3538925253060722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42064901) 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, 1105 + ... + 9238.

It is an arithmetic number, because the mean of its divisors is an integer number (4127256).

Almost surely, 2^42064981 is an apocalyptic number.

It is an amenable number.

42064981 is a deficient number, since it is larger than the sum of its proper divisors (7462091).

42064981 is a wasteful number, since it uses less digits than its factorization.

42064981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10440 (or 10433 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 42064981 is about 6485.7521537598. The cubic root of 42064981 is about 347.7818385349.

The spelling of 42064981 in words is "forty-two million, sixty-four thousand, nine hundred eighty-one".