25122149 has 16 divisors (see below), whose sum is σ = 28759920. Its totient is φ = 21772800.

The previous prime is 25122137. The next prime is 25122151. The reversal of 25122149 is 94122152.

It can be written as a sum of positive squares in 8 ways, for example, as 669124 + 24453025 = 818^2 + 4945^2 .

It is a cyclic number.

It is not a de Polignac number, because 25122149 - 2⁴ = 25122133 is a prime.

It is a super-2 number, since 2×25122149² = 1262244740756402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25122949) 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, 13049 + ... + 14849.

It is an arithmetic number, because the mean of its divisors is an integer number (1797495).

Almost surely, 2^25122149 is an apocalyptic number.

25122149 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

25122149 is a deficient number, since it is larger than the sum of its proper divisors (3637771).

25122149 is a wasteful number, since it uses less digits than its factorization.

25122149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880.

The product of its digits is 1440, while the sum is 26.

The square root of 25122149 is about 5012.2000159611. The cubic root of 25122149 is about 292.8772214442.

The spelling of 25122149 in words is "twenty-five million, one hundred twenty-two thousand, one hundred forty-nine".