25097481 has 12 divisors (see below), whose sum is σ = 36301252. Its totient is φ = 16708896.

The previous prime is 25097477. The next prime is 25097497. The reversal of 25097481 is 18479052.

25097481 is a `hidden beast` number, since 2 + 509 + 74 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20169081 + 4928400 = 4491^2 + 2220^2 .

It is not a de Polignac number, because 25097481 - 2² = 25097477 is a prime.

It is a super-2 number, since 2×25097481² = 1259767105090722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25097381) 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, 7575 + ... + 10371.

Almost surely, 2^25097481 is an apocalyptic number.

It is an amenable number.

25097481 is a deficient number, since it is larger than the sum of its proper divisors (11203771).

25097481 is a wasteful number, since it uses less digits than its factorization.

25097481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3800 (or 3797 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 25097481 is about 5009.7386159360. The cubic root of 25097481 is about 292.7813291530.

The spelling of 25097481 in words is "twenty-five million, ninety-seven thousand, four hundred eighty-one".