42520051 has 8 divisors (see below), whose sum is σ = 48810240. Its totient is φ = 36283848.

The previous prime is 42520039. The next prime is 42520057. The reversal of 42520051 is 15002524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42520051 - 2⁷ = 42519923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42520057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11791 + ... + 14968.

It is an arithmetic number, because the mean of its divisors is an integer number (6101280).

Almost surely, 2^42520051 is an apocalyptic number.

42520051 is a deficient number, since it is larger than the sum of its proper divisors (6290189).

42520051 is a wasteful number, since it uses less digits than its factorization.

42520051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26993.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 42520051 is about 6520.7400653607. The cubic root of 42520051 is about 349.0314747354.

Adding to 42520051 its reverse (15002524), we get a palindrome (57522575).

The spelling of 42520051 in words is "forty-two million, five hundred twenty thousand, fifty-one".