42075251 has 4 divisors (see below), whose sum is σ = 42181632. Its totient is φ = 41968872.

The previous prime is 42075247. The next prime is 42075301. The reversal of 42075251 is 15257024.

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 42075251 - 2² = 42075247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42075251.

It is not an unprimeable number, because it can be changed into a prime (42075151) 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, 52595 + ... + 53388.

It is an arithmetic number, because the mean of its divisors is an integer number (10545408).

Almost surely, 2^42075251 is an apocalyptic number.

42075251 is a deficient number, since it is larger than the sum of its proper divisors (106381).

42075251 is a wasteful number, since it uses less digits than its factorization.

42075251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106380.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 42075251 is about 6486.5438409063. The cubic root of 42075251 is about 347.8101394221.

The spelling of 42075251 in words is "forty-two million, seventy-five thousand, two hundred fifty-one".