25713261 has 32 divisors (see below), whose sum is σ = 44724480. Its totient is φ = 14292288.

The previous prime is 25713239. The next prime is 25713271. The reversal of 25713261 is 16231752.

It is a happy number.

25713261 is a `hidden beast` number, since 2 + 571 + 32 + 61 = 666.

It is not a de Polignac number, because 25713261 - 2⁷ = 25713133 is a prime.

It is a super-2 number, since 2×25713261² = 1322343582508242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25713211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5155 + ... + 8831.

It is an arithmetic number, because the mean of its divisors is an integer number (1397640).

Almost surely, 2^25713261 is an apocalyptic number.

25713261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25713261 is a deficient number, since it is larger than the sum of its proper divisors (19011219).

25713261 is a wasteful number, since it uses less digits than its factorization.

25713261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730 (or 3724 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 25713261 is about 5070.8244891733. The cubic root of 25713261 is about 295.1565232752.

It can be divided in two parts, 2571 and 3261, that added together give a cube (5832 = 18³).

The spelling of 25713261 in words is "twenty-five million, seven hundred thirteen thousand, two hundred sixty-one".