2492561 has 4 divisors (see below), whose sum is σ = 2496000. Its totient is φ = 2489124.

The previous prime is 2492549. The next prime is 2492563. The reversal of 2492561 is 1652942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2492561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2492563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (624000).

2^2492561 is an apocalyptic number.

It is an amenable number.

2492561 is a deficient number, since it is larger than the sum of its proper divisors (3439).

2492561 is a wasteful number, since it uses less digits than its factorization.

2492561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438.

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

The square root of 2492561 is about 1578.7846591603. The cubic root of 2492561 is about 135.5861300688.

The spelling of 2492561 in words is "two million, four hundred ninety-two thousand, five hundred sixty-one".