42523257 has 8 divisors (see below), whose sum is σ = 64797376. Its totient is φ = 24298992.

The previous prime is 42523253. The next prime is 42523291. The reversal of 42523257 is 75232524.

42523257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42523257 - 2² = 42523253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42523253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012438 + ... + 1012479.

It is an arithmetic number, because the mean of its divisors is an integer number (8099672).

Almost surely, 2^42523257 is an apocalyptic number.

It is an amenable number.

42523257 is a deficient number, since it is larger than the sum of its proper divisors (22274119).

42523257 is a wasteful number, since it uses less digits than its factorization.

42523257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024927.

The product of its digits is 16800, while the sum is 30.

The square root of 42523257 is about 6520.9858917191. The cubic root of 42523257 is about 349.0402468069.

The spelling of 42523257 in words is "forty-two million, five hundred twenty-three thousand, two hundred fifty-seven".