25813129 has 4 divisors (see below), whose sum is σ = 26001684. Its totient is φ = 25624576.

The previous prime is 25813127. The next prime is 25813133. The reversal of 25813129 is 92131852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8838729 + 16974400 = 2973^2 + 4120^2 .

It is a cyclic number.

It is not a de Polignac number, because 25813129 - 2¹ = 25813127 is a prime.

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 25813129.

It is not an unprimeable number, because it can be changed into a prime (25813121) 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, 94072 + ... + 94345.

It is an arithmetic number, because the mean of its divisors is an integer number (6500421).

Almost surely, 2^25813129 is an apocalyptic number.

It is an amenable number.

25813129 is a deficient number, since it is larger than the sum of its proper divisors (188555).

25813129 is a wasteful number, since it uses less digits than its factorization.

25813129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188554.

The product of its digits is 4320, while the sum is 31.

The square root of 25813129 is about 5080.6622599815. The cubic root of 25813129 is about 295.5381501225.

The spelling of 25813129 in words is "twenty-five million, eight hundred thirteen thousand, one hundred twenty-nine".