2560491 has 24 divisors (see below), whose sum is σ = 3944304. Its totient is φ = 1658880.

The previous prime is 2560487. The next prime is 2560499. The reversal of 2560491 is 1940652.

It is not a de Polignac number, because 2560491 - 2² = 2560487 is a prime.

It is a super-2 number, since 2×2560491² = 13112228322162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2560499) 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, 9835 + ... + 10091.

It is an arithmetic number, because the mean of its divisors is an integer number (164346).

2^2560491 is an apocalyptic number.

2560491 is a deficient number, since it is larger than the sum of its proper divisors (1383813).

2560491 is an equidigital number, since it uses as much as digits as its factorization.

2560491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2560491 is about 1600.1534301435. The cubic root of 2560491 is about 136.8068209895.

It can be divided in two parts, 25 and 60491, that added together give a square (60516 = 246²).

The spelling of 2560491 in words is "two million, five hundred sixty thousand, four hundred ninety-one".