25072749 has 12 divisors (see below), whose sum is σ = 39002236. Its totient is φ = 15429312.

The previous prime is 25072711. The next prime is 25072757. The reversal of 25072749 is 94727052.

It can be written as a sum of positive squares in 2 ways, for example, as 10304100 + 14768649 = 3210^2 + 3843^2 .

It is not a de Polignac number, because 25072749 - 2²⁰ = 24024173 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25072759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107032 + ... + 107265.

Almost surely, 2^25072749 is an apocalyptic number.

It is an amenable number.

25072749 is a deficient number, since it is larger than the sum of its proper divisors (13929487).

25072749 is a wasteful number, since it uses less digits than its factorization.

25072749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214316 (or 214313 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 25072749 is about 5007.2696152694. The cubic root of 25072749 is about 292.6851249738.

The spelling of 25072749 in words is "twenty-five million, seventy-two thousand, seven hundred forty-nine".