2561375 has 16 divisors (see below), whose sum is σ = 3304704. Its totient is φ = 1980000.

The previous prime is 2561341. The next prime is 2561387. The reversal of 2561375 is 5731652.

It is not a de Polignac number, because 2561375 - 2¹⁰ = 2560351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3545 + ... + 4205.

It is an arithmetic number, because the mean of its divisors is an integer number (206544).

2^2561375 is an apocalyptic number.

2561375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2561375 is a deficient number, since it is larger than the sum of its proper divisors (743329).

2561375 is an equidigital number, since it uses as much as digits as its factorization.

2561375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 697 counting only the distinct ones).

The product of its digits is 6300, while the sum is 29.

The square root of 2561375 is about 1600.4296298182. The cubic root of 2561375 is about 136.8225631935.

The spelling of 2561375 in words is "two million, five hundred sixty-one thousand, three hundred seventy-five".