811870245 has 48 divisors (see below), whose sum is σ = 1443536640. Its totient is φ = 421913472.

The previous prime is 811870231. The next prime is 811870277. The reversal of 811870245 is 542078118.

It is not a de Polignac number, because 811870245 - 2⁶ = 811870181 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 568222 + ... + 569648.

It is an arithmetic number, because the mean of its divisors is an integer number (30073680).

Almost surely, 2^811870245 is an apocalyptic number.

It is an amenable number.

811870245 is a deficient number, since it is larger than the sum of its proper divisors (631666395).

811870245 is a wasteful number, since it uses less digits than its factorization.

811870245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754 (or 1751 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 811870245 is about 28493.3368526749. The cubic root of 811870245 is about 932.8866430381.

The spelling of 811870245 in words is "eight hundred eleven million, eight hundred seventy thousand, two hundred forty-five".