2561492 has 24 divisors (see below), whose sum is σ = 4798080. Its totient is φ = 1192320.

The previous prime is 2561491. The next prime is 2561513. The reversal of 2561492 is 2941652.

It is a happy number.

2561492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2561492² = 13122482532128, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561491) 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 7 ways as a sum of consecutive naturals, for example, 9317 + ... + 9587.

It is an arithmetic number, because the mean of its divisors is an integer number (199920).

2^2561492 is an apocalyptic number.

It is an amenable number.

2561492 is a deficient number, since it is larger than the sum of its proper divisors (2236588).

2561492 is a wasteful number, since it uses less digits than its factorization.

2561492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 429 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 2561492 is about 1600.4661820857. The cubic root of 2561492 is about 136.8246464491.

The spelling of 2561492 in words is "two million, five hundred sixty-one thousand, four hundred ninety-two".