42625591 has 8 divisors (see below), whose sum is σ = 43946240. Its totient is φ = 41313888.

The previous prime is 42625559. The next prime is 42625619. The reversal of 42625591 is 19552624.

It is a happy number.

42625591 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 a cyclic number.

It is not a de Polignac number, because 42625591 - 2⁵ = 42625559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42625991) 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, 8170 + ... + 12328.

It is an arithmetic number, because the mean of its divisors is an integer number (5493280).

Almost surely, 2^42625591 is an apocalyptic number.

42625591 is a deficient number, since it is larger than the sum of its proper divisors (1320649).

42625591 is a wasteful number, since it uses less digits than its factorization.

42625591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473.

The product of its digits is 21600, while the sum is 34.

The square root of 42625591 is about 6528.8276895627. The cubic root of 42625591 is about 349.3200158286.

The spelling of 42625591 in words is "forty-two million, six hundred twenty-five thousand, five hundred ninety-one".