2536621 has 4 divisors (see below), whose sum is σ = 2685852. Its totient is φ = 2387392.

The previous prime is 2536603. The next prime is 2536631. The reversal of 2536621 is 1266352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1357225 + 1179396 = 1165^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2536621 - 2¹⁹ = 2012333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2536631) 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, 74590 + ... + 74623.

It is an arithmetic number, because the mean of its divisors is an integer number (671463).

2^2536621 is an apocalyptic number.

It is an amenable number.

2536621 is a deficient number, since it is larger than the sum of its proper divisors (149231).

2536621 is a wasteful number, since it uses less digits than its factorization.

2536621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149230.

The product of its digits is 2160, while the sum is 25.

The square root of 2536621 is about 1592.6773056712. The cubic root of 2536621 is about 136.3803690040.

The spelling of 2536621 in words is "two million, five hundred thirty-six thousand, six hundred twenty-one".