25552129 has 4 divisors (see below), whose sum is σ = 25564500. Its totient is φ = 25539760.

The previous prime is 25552123. The next prime is 25552147. The reversal of 25552129 is 92125552.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12215025 + 13337104 = 3495^2 + 3652^2 .

It is a cyclic number.

It is not a de Polignac number, because 25552129 - 2²³ = 17163521 is a prime.

It is a super-2 number, since 2×25552129² = 1305822592865282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25552129.

It is not an unprimeable number, because it can be changed into a prime (25552123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254 + ... + 7495.

It is an arithmetic number, because the mean of its divisors is an integer number (6391125).

Almost surely, 2^25552129 is an apocalyptic number.

It is an amenable number.

25552129 is a deficient number, since it is larger than the sum of its proper divisors (12371).

25552129 is an equidigital number, since it uses as much as digits as its factorization.

25552129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12370.

The product of its digits is 9000, while the sum is 31.

The square root of 25552129 is about 5054.9113740995. The cubic root of 25552129 is about 294.5386987309.

The spelling of 25552129 in words is "twenty-five million, five hundred fifty-two thousand, one hundred twenty-nine".