815654245 has 12 divisors (see below), whose sum is σ = 1138587084. Its totient is φ = 559305600.

The previous prime is 815654239. The next prime is 815654263. The reversal of 815654245 is 542456518.

It can be written as a sum of positive squares in 2 ways, for example, as 488984769 + 326669476 = 22113^2 + 18074^2 .

It is not a de Polignac number, because 815654245 - 2²¹ = 813557093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 815654198 and 815654207.

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, 1664356 + ... + 1664845.

It is an arithmetic number, because the mean of its divisors is an integer number (94882257).

Almost surely, 2^815654245 is an apocalyptic number.

It is an amenable number.

815654245 is a deficient number, since it is larger than the sum of its proper divisors (322932839).

815654245 is a wasteful number, since it uses less digits than its factorization.

815654245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329220 (or 3329213 counting only the distinct ones).

The product of its digits is 192000, while the sum is 40.

The square root of 815654245 is about 28559.6611499506. The cubic root of 815654245 is about 934.3337432819. Note that the first 3 decimals are identical.

The spelling of 815654245 in words is "eight hundred fifteen million, six hundred fifty-four thousand, two hundred forty-five".