42025531 has 4 divisors (see below), whose sum is σ = 43852752. Its totient is φ = 40198312.

The previous prime is 42025519. The next prime is 42025561. The reversal of 42025531 is 13552024.

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

It is a cyclic number.

It is not a de Polignac number, because 42025531 - 2⁵ = 42025499 is a prime.

It is a super-2 number, since 2×42025531² = 3532290511663922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42025561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913576 + ... + 913621.

It is an arithmetic number, because the mean of its divisors is an integer number (10963188).

Almost surely, 2^42025531 is an apocalyptic number.

42025531 is a deficient number, since it is larger than the sum of its proper divisors (1827221).

42025531 is a wasteful number, since it uses less digits than its factorization.

42025531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827220.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 42025531 is about 6482.7101585679. The cubic root of 42025531 is about 347.6730839013.

Adding to 42025531 its reverse (13552024), we get a palindrome (55577555).

The spelling of 42025531 in words is "forty-two million, twenty-five thousand, five hundred thirty-one".