25251905 has 12 divisors (see below), whose sum is σ = 35249940. Its totient is φ = 17315424.

The previous prime is 25251899. The next prime is 25251911. The reversal of 25251905 is 50915252.

It is an interprime number because it is at equal distance from previous prime (25251899) and next prime (25251911).

It can be written as a sum of positive squares in 2 ways, for example, as 15808576 + 9443329 = 3976^2 + 3073^2 .

It is not a de Polignac number, because 25251905 - 2¹² = 25247809 is a prime.

It is a super-2 number, since 2×25251905² = 1275317412258050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51290 + ... + 51779.

It is an arithmetic number, because the mean of its divisors is an integer number (2937495).

Almost surely, 2^25251905 is an apocalyptic number.

It is an amenable number.

25251905 is a deficient number, since it is larger than the sum of its proper divisors (9998035).

25251905 is a wasteful number, since it uses less digits than its factorization.

25251905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103088 (or 103081 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 25251905 is about 5025.1273615701. The cubic root of 25251905 is about 293.3805931373.

The spelling of 25251905 in words is "twenty-five million, two hundred fifty-one thousand, nine hundred five".