25161003 has 64 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 13132800.

The previous prime is 25161001. The next prime is 25161013. The reversal of 25161003 is 30016152.

25161003 is a `hidden beast` number, since 2 + 51 + 610 + 0 + 3 = 666.

It is not a de Polignac number, because 25161003 - 2¹ = 25161001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25161001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131638 + ... + 131828.

It is an arithmetic number, because the mean of its divisors is an integer number (725760).

Almost surely, 2^25161003 is an apocalyptic number.

25161003 is a deficient number, since it is larger than the sum of its proper divisors (21287637).

25161003 is a wasteful number, since it uses less digits than its factorization.

25161003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 25161003 is about 5016.0744611698. The cubic root of 25161003 is about 293.0281319694.

Adding to 25161003 its reverse (30016152), we get a palindrome (55177155).

It can be divided in two parts, 25 and 161003, that added together give a triangular number (161028 = T₅₆₇).

The spelling of 25161003 in words is "twenty-five million, one hundred sixty-one thousand, three".