42056986 has 4 divisors (see below), whose sum is σ = 63085482. Its totient is φ = 21028492.

The previous prime is 42056977. The next prime is 42057007. The reversal of 42056986 is 68965024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33466225 + 8590761 = 5785^2 + 2931^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10514245 + ... + 10514248.

Almost surely, 2^42056986 is an apocalyptic number.

42056986 is a deficient number, since it is larger than the sum of its proper divisors (21028496).

42056986 is a wasteful number, since it uses less digits than its factorization.

42056986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21028495.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 42056986 is about 6485.1357734438. The cubic root of 42056986 is about 347.7598036427.

The spelling of 42056986 in words is "forty-two million, fifty-six thousand, nine hundred eighty-six".