425015891 has 4 divisors (see below), whose sum is σ = 425167512. Its totient is φ = 424864272.

The previous prime is 425015887. The next prime is 425015911. The reversal of 425015891 is 198510524.

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 425015891 - 2² = 425015887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425015821) 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, 71525 + ... + 77238.

It is an arithmetic number, because the mean of its divisors is an integer number (106291878).

Almost surely, 2^425015891 is an apocalyptic number.

425015891 is a deficient number, since it is larger than the sum of its proper divisors (151621).

425015891 is a wasteful number, since it uses less digits than its factorization.

425015891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151620.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 425015891 is about 20615.9135378474. The cubic root of 425015891 is about 751.8566686566.

The spelling of 425015891 in words is "four hundred twenty-five million, fifteen thousand, eight hundred ninety-one".