42504031 has 4 divisors (see below), whose sum is σ = 43086352. Its totient is φ = 41921712.

The previous prime is 42504019. The next prime is 42504037. The reversal of 42504031 is 13040524.

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 42504031 - 2¹¹ = 42501983 is a prime.

It is a super-2 number, since 2×42504031² = 3613185302497922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42504037) 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, 291051 + ... + 291196.

It is an arithmetic number, because the mean of its divisors is an integer number (10771588).

Almost surely, 2^42504031 is an apocalyptic number.

42504031 is a deficient number, since it is larger than the sum of its proper divisors (582321).

42504031 is an equidigital number, since it uses as much as digits as its factorization.

42504031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582320.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42504031 is about 6519.5115614592. The cubic root of 42504031 is about 348.9876351314.

Adding to 42504031 its reverse (13040524), we get a palindrome (55544555).

It can be divided in two parts, 4250 and 4031, that added together give a square (8281 = 91²).

The spelling of 42504031 in words is "forty-two million, five hundred four thousand, thirty-one".