25402534 has 16 divisors (see below), whose sum is σ = 40733280. Its totient is φ = 11851840.

The previous prime is 25402499. The next prime is 25402541. The reversal of 25402534 is 43520452.

It is a junction number, because it is equal to n+sod(n) for n = 25402499 and 25402508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4849 + ... + 8620.

It is an arithmetic number, because the mean of its divisors is an integer number (2545830).

Almost surely, 2^25402534 is an apocalyptic number.

25402534 is a deficient number, since it is larger than the sum of its proper divisors (15330746).

25402534 is a wasteful number, since it uses less digits than its factorization.

25402534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13535.

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

The square root of 25402534 is about 5040.0926578784. The cubic root of 25402534 is about 293.9627808562.

Adding to 25402534 its reverse (43520452), we get a palindrome (68922986).

The spelling of 25402534 in words is "twenty-five million, four hundred two thousand, five hundred thirty-four".