901978225 has 12 divisors (see below), whose sum is σ = 1122713856. Its totient is φ = 718833680.

The previous prime is 901978219. The next prime is 901978237. The reversal of 901978225 is 522879109.

It is not a de Polignac number, because 901978225 - 2²³ = 893589617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62017 + ... + 75166.

It is an arithmetic number, because the mean of its divisors is an integer number (93559488).

Almost surely, 2^901978225 is an apocalyptic number.

It is an amenable number.

901978225 is a deficient number, since it is larger than the sum of its proper divisors (220735631).

901978225 is a wasteful number, since it uses less digits than its factorization.

901978225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137456 (or 137451 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 901978225 is about 30032.9523190778. The cubic root of 901978225 is about 966.1962577782.

The spelling of 901978225 in words is "nine hundred one million, nine hundred seventy-eight thousand, two hundred twenty-five".