25581002 has 16 divisors (see below), whose sum is σ = 39127200. Its totient is φ = 12540528.

The previous prime is 25580981. The next prime is 25581013. The reversal of 25581002 is 20018552.

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, 46493 + ... + 47039.

It is an arithmetic number, because the mean of its divisors is an integer number (2445450).

Almost surely, 2^25581002 is an apocalyptic number.

25581002 is a deficient number, since it is larger than the sum of its proper divisors (13546198).

25581002 is a wasteful number, since it uses less digits than its factorization.

25581002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 25581002 is about 5057.7665031118. The cubic root of 25581002 is about 294.6495964008.

Adding to 25581002 its reverse (20018552), we get a palindrome (45599554).

The spelling of 25581002 in words is "twenty-five million, five hundred eighty-one thousand, two".