801856925 has 12 divisors (see below), whose sum is σ = 994933716. Its totient is φ = 641078400.

The previous prime is 801856897. The next prime is 801856949. The reversal of 801856925 is 529658108.

It can be written as a sum of positive squares in 6 ways, for example, as 112741924 + 689115001 = 10618^2 + 26251^2 .

It is not a de Polignac number, because 801856925 - 2¹² = 801852829 is a prime.

It is a Duffinian number.

It is a congruent 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, 33707 + ... + 52343.

It is an arithmetic number, because the mean of its divisors is an integer number (82911143).

Almost surely, 2^801856925 is an apocalyptic number.

It is an amenable number.

801856925 is a deficient number, since it is larger than the sum of its proper divisors (193076791).

801856925 is a wasteful number, since it uses less digits than its factorization.

801856925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20368 (or 20363 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 801856925 is about 28317.0783273981. The cubic root of 801856925 is about 929.0354685713.

The spelling of 801856925 in words is "eight hundred one million, eight hundred fifty-six thousand, nine hundred twenty-five".