25121493 has 12 divisors (see below), whose sum is σ = 36431148. Its totient is φ = 16680960.

The previous prime is 25121471. The next prime is 25121507. The reversal of 25121493 is 39412152.

25121493 is a `hidden beast` number, since 2 + 512 + 149 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19158129 + 5963364 = 4377^2 + 2442^2 .

It is not a de Polignac number, because 25121493 - 2⁸ = 25121237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25121443) 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, 3118 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (3035929).

Almost surely, 2^25121493 is an apocalyptic number.

It is an amenable number.

25121493 is a deficient number, since it is larger than the sum of its proper divisors (11309655).

25121493 is a wasteful number, since it uses less digits than its factorization.

25121493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124 (or 11121 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 25121493 is about 5012.1345752085. The cubic root of 25121493 is about 292.8746721781.

It can be divided in two parts, 2512149 and 3, that added together give a palindrome (2512152).

The spelling of 25121493 in words is "twenty-five million, one hundred twenty-one thousand, four hundred ninety-three".