25391139 has 32 divisors (see below), whose sum is σ = 36888576. Its totient is φ = 15500160.

The previous prime is 25391137. The next prime is 25391141. The reversal of 25391139 is 93119352.

It is an interprime number because it is at equal distance from previous prime (25391137) and next prime (25391141).

It is not a de Polignac number, because 25391139 - 2¹ = 25391137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25391131) 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, 161649 + ... + 161805.

It is an arithmetic number, because the mean of its divisors is an integer number (1152768).

Almost surely, 2^25391139 is an apocalyptic number.

25391139 is a deficient number, since it is larger than the sum of its proper divisors (11497437).

25391139 is a wasteful number, since it uses less digits than its factorization.

25391139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275.

The product of its digits is 7290, while the sum is 33.

The square root of 25391139 is about 5038.9620955113. The cubic root of 25391139 is about 293.9188192724.

The spelling of 25391139 in words is "twenty-five million, three hundred ninety-one thousand, one hundred thirty-nine".