42504291 has 16 divisors (see below), whose sum is σ = 63769600. Its totient is φ = 27976104.

The previous prime is 42504281. The next prime is 42504313. The reversal of 42504291 is 19240524.

It is not a de Polignac number, because 42504291 - 2¹⁰ = 42503267 is a prime.

It is a super-2 number, since 2×42504291² = 3613229506825362, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42504271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7831 + ... + 12096.

It is an arithmetic number, because the mean of its divisors is an integer number (3985600).

Almost surely, 2^42504291 is an apocalyptic number.

42504291 is a deficient number, since it is larger than the sum of its proper divisors (21265309).

42504291 is a wasteful number, since it uses less digits than its factorization.

42504291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20015 (or 20009 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 42504291 is about 6519.5315015728. The cubic root of 42504291 is about 348.9883467235.

The spelling of 42504291 in words is "forty-two million, five hundred four thousand, two hundred ninety-one".