2562639 has 4 divisors (see below), whose sum is σ = 3416856. Its totient is φ = 1708424.

The previous prime is 2562629. The next prime is 2562641. The reversal of 2562639 is 9362652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2562639 - 2⁸ = 2562383 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 5³ + 6 + 2²¹ + 6⁷ + 3¹¹ + 9² .

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2562619) 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, 427104 + ... + 427109.

It is an arithmetic number, because the mean of its divisors is an integer number (854214).

2^2562639 is an apocalyptic number.

2562639 is a deficient number, since it is larger than the sum of its proper divisors (854217).

2562639 is an equidigital number, since it uses as much as digits as its factorization.

2562639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854216.

The product of its digits is 19440, while the sum is 33.

The square root of 2562639 is about 1600.8244750753. The cubic root of 2562639 is about 136.8450661173.

The spelling of 2562639 in words is "two million, five hundred sixty-two thousand, six hundred thirty-nine".