42520642 has 4 divisors (see below), whose sum is σ = 63780966. Its totient is φ = 21260320.

The previous prime is 42520627. The next prime is 42520661. The reversal of 42520642 is 24602524.

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., 29495761 + 13024881 = 5431^2 + 3609^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630159 + ... + 10630162.

Almost surely, 2^42520642 is an apocalyptic number.

42520642 is a deficient number, since it is larger than the sum of its proper divisors (21260324).

42520642 is a wasteful number, since it uses less digits than its factorization.

42520642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21260323.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 42520642 is about 6520.7853821453. The cubic root of 42520642 is about 349.0330918285.

The spelling of 42520642 in words is "forty-two million, five hundred twenty thousand, six hundred forty-two".