2567651 has 4 divisors (see below), whose sum is σ = 2679312. Its totient is φ = 2455992.

The previous prime is 2567647. The next prime is 2567671. The reversal of 2567651 is 1567652.

It is a happy number.

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 2567651 - 2² = 2567647 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2567611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55796 + ... + 55841.

It is an arithmetic number, because the mean of its divisors is an integer number (669828).

2^2567651 is an apocalyptic number.

2567651 is a deficient number, since it is larger than the sum of its proper divisors (111661).

2567651 is a wasteful number, since it uses less digits than its factorization.

2567651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111660.

The product of its digits is 12600, while the sum is 32.

The square root of 2567651 is about 1602.3891537326. The cubic root of 2567651 is about 136.9342217127.

Subtracting from 2567651 its reverse (1567652), we obtain a palindrome (999999).

It can be divided in two parts, 25 and 67651, that added together give a palindrome (67676).

The spelling of 2567651 in words is "two million, five hundred sixty-seven thousand, six hundred fifty-one".