849431025 has 81 divisors (see below), whose sum is σ = 1599566241. Its totient is φ = 430879680.

The previous prime is 849430957. The next prime is 849431059. The reversal of 849431025 is 520134948.

The square root of 849431025 is 29145.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 11675889 + 837755136 = 3417^2 + 28944^2 .

It is a de Polignac number, because none of the positive numbers 2^k-849431025 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 12678042 + ... + 12678108.

Almost surely, 2^849431025 is an apocalyptic number.

849431025 is the 29145-th square number.

849431025 is the 14573-rd centered octagonal number.

It is an amenable number.

849431025 is a deficient number, since it is larger than the sum of its proper divisors (750135216).

849431025 is a wasteful number, since it uses less digits than its factorization.

849431025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The cubic root of 849431025 is about 947.0568284606.

Multiplying 849431025 by its sum of digits (36), we get a square (30579516900 = 174870²).

The spelling of 849431025 in words is "eight hundred forty-nine million, four hundred thirty-one thousand, twenty-five".