25307138 has 8 divisors (see below), whose sum is σ = 38010060. Its totient is φ = 12637120.

The previous prime is 25307137. The next prime is 25307143. The reversal of 25307138 is 83170352.

It can be written as a sum of positive squares in 2 ways, for example, as 17783089 + 7524049 = 4217^2 + 2743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25307138.

It is not an unprimeable number, because it can be changed into a prime (25307137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6203 + ... + 9438.

Almost surely, 2^25307138 is an apocalyptic number.

25307138 is a deficient number, since it is larger than the sum of its proper divisors (12702922).

25307138 is a wasteful number, since it uses less digits than its factorization.

25307138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16452.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 25307138 is about 5030.6200413070. The cubic root of 25307138 is about 293.5943392578.

The spelling of 25307138 in words is "twenty-five million, three hundred seven thousand, one hundred thirty-eight".