2565025 has 24 divisors (see below), whose sum is σ = 3392640. Its totient is φ = 1920960.

The previous prime is 2565023. The next prime is 2565047. The reversal of 2565025 is 5205652.

2565025 = 21² + 22² + ... + 197².

It is not a de Polignac number, because 2565025 - 2¹ = 2565023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

2565025 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2565023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43446 + ... + 43504.

It is an arithmetic number, because the mean of its divisors is an integer number (141360).

2^2565025 is an apocalyptic number.

2565025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2565025 is the 925-th octagonal number.

It is an amenable number.

2565025 is a deficient number, since it is larger than the sum of its proper divisors (827615).

2565025 is a wasteful number, since it uses less digits than its factorization.

2565025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 2565025 is about 1601.5695426674. The cubic root of 2565025 is about 136.8875237875.

It can be divided in two parts, 25 and 65025, that multiplied together give a square (1625625 = 1275²).

The spelling of 2565025 in words is "two million, five hundred sixty-five thousand, twenty-five".