2549641 has 4 divisors (see below), whose sum is σ = 2553552. Its totient is φ = 2545732.

The previous prime is 2549623. The next prime is 2549647. The reversal of 2549641 is 1469452.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2549641 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2549647) 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, 715 + ... + 2368.

It is an arithmetic number, because the mean of its divisors is an integer number (638388).

2^2549641 is an apocalyptic number.

It is an amenable number.

2549641 is a deficient number, since it is larger than the sum of its proper divisors (3911).

2549641 is an equidigital number, since it uses as much as digits as its factorization.

2549641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910.

The product of its digits is 8640, while the sum is 31.

The square root of 2549641 is about 1596.7595310503. The cubic root of 2549641 is about 136.6133091993.

The spelling of 2549641 in words is "two million, five hundred forty-nine thousand, six hundred forty-one".