25215345 has 12 divisors (see below), whose sum is σ = 43706676. Its totient is φ = 13448160.

The previous prime is 25215343. The next prime is 25215347. The reversal of 25215345 is 54351252.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25215343) and next prime (25215347).

It can be written as a sum of positive squares in 2 ways, for example, as 14930496 + 10284849 = 3864^2 + 3207^2 .

It is not a de Polignac number, because 25215345 - 2¹ = 25215343 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25215341) 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, 280126 + ... + 280215.

It is an arithmetic number, because the mean of its divisors is an integer number (3642223).

Almost surely, 2^25215345 is an apocalyptic number.

It is an amenable number.

25215345 is a deficient number, since it is larger than the sum of its proper divisors (18491331).

25215345 is a wasteful number, since it uses less digits than its factorization.

25215345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560352 (or 560349 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 25215345 is about 5021.4883251881. The cubic root of 25215345 is about 293.2389381472.

Adding to 25215345 its reverse (54351252), we get a palindrome (79566597).

The spelling of 25215345 in words is "twenty-five million, two hundred fifteen thousand, three hundred forty-five".