25716139 has 16 divisors (see below), whose sum is σ = 28627200. Its totient is φ = 22990176.

The previous prime is 25716109. The next prime is 25716167. The reversal of 25716139 is 93161752.

It is a cyclic number.

It is not a de Polignac number, because 25716139 - 2¹³ = 25707947 is a prime.

It is a super-2 number, since 2×25716139² = 1322639610134642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25716109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35917 + ... + 36625.

It is an arithmetic number, because the mean of its divisors is an integer number (1789200).

Almost surely, 2^25716139 is an apocalyptic number.

25716139 is a deficient number, since it is larger than the sum of its proper divisors (2911061).

25716139 is a wasteful number, since it uses less digits than its factorization.

25716139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834.

The product of its digits is 11340, while the sum is 34.

The square root of 25716139 is about 5071.1082615144. The cubic root of 25716139 is about 295.1675348279.

The spelling of 25716139 in words is "twenty-five million, seven hundred sixteen thousand, one hundred thirty-nine".