25877569 has 3 divisors (see below), whose sum is σ = 25882657. Its totient is φ = 25872482.

The previous prime is 25877567. The next prime is 25877573. The reversal of 25877569 is 96577852.

The square root of 25877569 is 5087.

It is a perfect power (a square), and thus also a powerful number.

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 is not a de Polignac number, because 25877569 - 2¹ = 25877567 is a prime.

It is a super-2 number, since 2×25877569² = 1339297154699522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25877561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2544 + ... + 7630.

Almost surely, 2^25877569 is an apocalyptic number.

25877569 is the 5087-th square number.

25877569 is the 2544-th centered octagonal number.

It is an amenable number.

25877569 is a deficient number, since it is larger than the sum of its proper divisors (5088).

25877569 is an frugal number, since it uses more digits than its factorization.

25877569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10174 (or 5087 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 49.

The cubic root of 25877569 is about 295.7838733068.

Multiplying 25877569 by its sum of digits (49), we get a square (1268000881 = 35609²).

The spelling of 25877569 in words is "twenty-five million, eight hundred seventy-seven thousand, five hundred sixty-nine".