25400052 has 36 divisors (see below), whose sum is σ = 64804740. Its totient is φ = 8387712.

The previous prime is 25400051. The next prime is 25400059. The reversal of 25400052 is 25000452.

It can be written as a sum of positive squares in 2 ways, for example, as 10929636 + 14470416 = 3306^2 + 3804^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25399998 and 25400034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25400051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 688 + ... + 7160.

Almost surely, 2^25400052 is an apocalyptic number.

It is an amenable number.

25400052 is an abundant number, since it is smaller than the sum of its proper divisors (39404688).

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

25400052 is a wasteful number, since it uses less digits than its factorization.

25400052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6592 (or 6587 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 25400052 is about 5039.8464262317. The cubic root of 25400052 is about 293.9532064913.

Adding to 25400052 its product of nonzero digits (400), we get a palindrome (25400452).

The spelling of 25400052 in words is "twenty-five million, four hundred thousand, fifty-two".