25534420 has 12 divisors (see below), whose sum is σ = 53622324. Its totient is φ = 10213760.

The previous prime is 25534381. The next prime is 25534427. The reversal of 25534420 is 2443552.

It can be written as a sum of positive squares in 2 ways, for example, as 15586704 + 9947716 = 3948^2 + 3154^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25534427) 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, 638341 + ... + 638380.

It is an arithmetic number, because the mean of its divisors is an integer number (4468527).

Almost surely, 2^25534420 is an apocalyptic number.

25534420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25534420 is an abundant number, since it is smaller than the sum of its proper divisors (28087904).

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

25534420 is a wasteful number, since it uses less digits than its factorization.

25534420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276730 (or 1276728 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 25534420 is about 5053.1594077369. The cubic root of 25534420 is about 294.4706392845.

Adding to 25534420 its reverse (2443552), we get a palindrome (27977972).

The spelling of 25534420 in words is "twenty-five million, five hundred thirty-four thousand, four hundred twenty".