25021197 has 16 divisors (see below), whose sum is σ = 37176960. Its totient is φ = 16632000.

The previous prime is 25021189. The next prime is 25021219. The reversal of 25021197 is 79112052.

It is not a de Polignac number, because 25021197 - 2³ = 25021189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 25021197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25021177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9672 + ... + 11982.

It is an arithmetic number, because the mean of its divisors is an integer number (2323560).

Almost surely, 2^25021197 is an apocalyptic number.

25021197 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25021197 is a deficient number, since it is larger than the sum of its proper divisors (12155763).

25021197 is a wasteful number, since it uses less digits than its factorization.

25021197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 25021197 is about 5002.1192508776. The cubic root of 25021197 is about 292.4843910145.

The spelling of 25021197 in words is "twenty-five million, twenty-one thousand, one hundred ninety-seven".