25134138 has 40 divisors (see below), whose sum is σ = 56858868. Its totient is φ = 8297856.

The previous prime is 25134133. The next prime is 25134139. The reversal of 25134138 is 83143152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25130169 + 3969 = 5013^2 + 63^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25134133) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17620 + ... + 18992.

Almost surely, 2^25134138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25134138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28429434).

25134138 is an abundant number, since it is smaller than the sum of its proper divisors (31724730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25134138 is a wasteful number, since it uses less digits than its factorization.

25134138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500 (or 1491 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 25134138 is about 5013.3958551066. The cubic root of 25134138 is about 292.9238037993.

The spelling of 25134138 in words is "twenty-five million, one hundred thirty-four thousand, one hundred thirty-eight".