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25492 = 226373

25492 has 6 divisors (see below), whose sum is σ = 44618. Its totient is φ = 12744.

The previous prime is 25471. The next prime is 25523. The reversal of 25492 is 29452.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24336 + 1156 = 156^2 + 34^2 .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

25492 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3183 + ... + 3190.

225492 is an apocalyptic number.

It is an amenable number.

25492 is a deficient number, since it is larger than the sum of its proper divisors (19126).

25492 is a wasteful number, since it uses less digits than its factorization.

25492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6377 (or 6375 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 25492 is about 159.6621432901. The cubic root of 25492 is about 29.4307482152.

The spelling of 25492 in words is "twenty-five thousand, four hundred ninety-two".

Divisors: 1 2 4 6373 12746 25492