2560631 has 4 divisors (see below), whose sum is σ = 2643264. Its totient is φ = 2478000.

The previous prime is 2560603. The next prime is 2560637. The reversal of 2560631 is 1360652.

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

It is a cyclic number.

It is not a de Polignac number, because 2560631 - 2¹⁰ = 2559607 is a prime.

It is a super-2 number, since 2×2560631² = 13113662236322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2560597 and 2560606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560637) 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, 41270 + ... + 41331.

It is an arithmetic number, because the mean of its divisors is an integer number (660816).

2^2560631 is an apocalyptic number.

2560631 is a deficient number, since it is larger than the sum of its proper divisors (82633).

2560631 is an equidigital number, since it uses as much as digits as its factorization.

2560631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82632.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2560631 is about 1600.1971753506. The cubic root of 2560631 is about 136.8093143402.

The spelling of 2560631 in words is "two million, five hundred sixty thousand, six hundred thirty-one".