2564149 has 4 divisors (see below), whose sum is σ = 2930464. Its totient is φ = 2197836.

The previous prime is 2564147. The next prime is 2564171. The reversal of 2564149 is 9414652.

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 not a de Polignac number, because 2564149 - 2¹ = 2564147 is a prime.

It is a Duffinian number.

2564149 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2564149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564143) 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, 183147 + ... + 183160.

It is an arithmetic number, because the mean of its divisors is an integer number (732616).

2^2564149 is an apocalyptic number.

It is an amenable number.

2564149 is a deficient number, since it is larger than the sum of its proper divisors (366315).

2564149 is an equidigital number, since it uses as much as digits as its factorization.

2564149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366314.

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

The square root of 2564149 is about 1601.2960375896. The cubic root of 2564149 is about 136.8719388680.

The spelling of 2564149 in words is "two million, five hundred sixty-four thousand, one hundred forty-nine".