2621251 has 4 divisors (see below), whose sum is σ = 2630992. Its totient is φ = 2611512.

The previous prime is 2621239. The next prime is 2621257. The reversal of 2621251 is 1521262.

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 2621251 - 2⁵ = 2621219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621257) 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, 4455 + ... + 5008.

It is an arithmetic number, because the mean of its divisors is an integer number (657748).

2^2621251 is an apocalyptic number.

2621251 is a deficient number, since it is larger than the sum of its proper divisors (9741).

2621251 is an equidigital number, since it uses as much as digits as its factorization.

2621251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9740.

The product of its digits is 240, while the sum is 19.

The square root of 2621251 is about 1619.0277946966. The cubic root of 2621251 is about 137.8805063767.

The spelling of 2621251 in words is "two million, six hundred twenty-one thousand, two hundred fifty-one".