42504289 has 4 divisors (see below), whose sum is σ = 42917056. Its totient is φ = 42091524.

The previous prime is 42504281. The next prime is 42504313. The reversal of 42504289 is 98240524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42504289 - 2³ = 42504281 is a prime.

It is a super-2 number, since 2×42504289² = 3613229166791042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42504281) 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, 206229 + ... + 206434.

It is an arithmetic number, because the mean of its divisors is an integer number (10729264).

Almost surely, 2^42504289 is an apocalyptic number.

It is an amenable number.

42504289 is a deficient number, since it is larger than the sum of its proper divisors (412767).

42504289 is a wasteful number, since it uses less digits than its factorization.

42504289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412766.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 42504289 is about 6519.5313481875. The cubic root of 42504289 is about 348.9883412498.

The spelling of 42504289 in words is "forty-two million, five hundred four thousand, two hundred eighty-nine".