42625491 has 4 divisors (see below), whose sum is σ = 56833992. Its totient is φ = 28416992.

The previous prime is 42625487. The next prime is 42625523. The reversal of 42625491 is 19452624.

42625491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42625491 - 2² = 42625487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42625421) 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 3 ways as a sum of consecutive naturals, for example, 7104246 + ... + 7104251.

It is an arithmetic number, because the mean of its divisors is an integer number (14208498).

Almost surely, 2^42625491 is an apocalyptic number.

42625491 is a deficient number, since it is larger than the sum of its proper divisors (14208501).

42625491 is a wasteful number, since it uses less digits than its factorization.

42625491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14208500.

The product of its digits is 17280, while the sum is 33.

The square root of 42625491 is about 6528.8200312154. The cubic root of 42625491 is about 349.3197426591.

The spelling of 42625491 in words is "forty-two million, six hundred twenty-five thousand, four hundred ninety-one".