42536257 has 4 divisors (see below), whose sum is σ = 42622000. Its totient is φ = 42450516.

The previous prime is 42536239. The next prime is 42536287. The reversal of 42536257 is 75263524.

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 42536257 - 2⁷ = 42536129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42536287) 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, 42123 + ... + 43120.

It is an arithmetic number, because the mean of its divisors is an integer number (10655500).

Almost surely, 2^42536257 is an apocalyptic number.

It is an amenable number.

42536257 is a deficient number, since it is larger than the sum of its proper divisors (85743).

42536257 is an equidigital number, since it uses as much as digits as its factorization.

42536257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85742.

The product of its digits is 50400, while the sum is 34.

The square root of 42536257 is about 6521.9825973396. The cubic root of 42536257 is about 349.0758121361.

The spelling of 42536257 in words is "forty-two million, five hundred thirty-six thousand, two hundred fifty-seven".