25122145 has 8 divisors (see below), whose sum is σ = 30349800. Its totient is φ = 19962240.

The previous prime is 25122137. The next prime is 25122151. The reversal of 25122145 is 54122152.

It can be written as a sum of positive squares in 4 ways, for example, as 1151329 + 23970816 = 1073^2 + 4896^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25122145 - 2³ = 25122137 is a prime.

It is a super-2 number, since 2×25122145² = 1262244338802050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16116 + ... + 17605.

It is an arithmetic number, because the mean of its divisors is an integer number (3793725).

Almost surely, 2^25122145 is an apocalyptic number.

It is an amenable number.

25122145 is a deficient number, since it is larger than the sum of its proper divisors (5227655).

25122145 is a wasteful number, since it uses less digits than its factorization.

25122145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33875.

The product of its digits is 800, while the sum is 22.

The square root of 25122145 is about 5012.1996169347. The cubic root of 25122145 is about 292.8772059001.

Adding to 25122145 its reverse (54122152), we get a palindrome (79244297).

The spelling of 25122145 in words is "twenty-five million, one hundred twenty-two thousand, one hundred forty-five".