25352649 has 24 divisors (see below), whose sum is σ = 43693920. Its totient is φ = 14486472.

The previous prime is 25352617. The next prime is 25352651. The reversal of 25352649 is 94625352.

25352649 is a `hidden beast` number, since 2 + 5 + 3 + 5 + 2 + 649 = 666.

It is not a de Polignac number, because 25352649 - 2⁵ = 25352617 is a prime.

It is a super-2 number, since 2×25352649² = 1285513622634402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25352449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8259 + ... + 10904.

It is an arithmetic number, because the mean of its divisors is an integer number (1820580).

Almost surely, 2^25352649 is an apocalyptic number.

It is an amenable number.

25352649 is a deficient number, since it is larger than the sum of its proper divisors (18341271).

25352649 is a wasteful number, since it uses less digits than its factorization.

25352649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19186 (or 19173 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 25352649 is about 5035.1414081434. The cubic root of 25352649 is about 293.7702286356.

It can be divided in two parts, 2535 and 2649, that added together give a square (5184 = 72²).

The spelling of 25352649 in words is "twenty-five million, three hundred fifty-two thousand, six hundred forty-nine".