2361621 has 4 divisors (see below), whose sum is σ = 3148832. Its totient is φ = 1574412.

The previous prime is 2361607. The next prime is 2361629. The reversal of 2361621 is 1261632.

It is a happy number.

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 not a de Polignac number, because 2361621 - 2⁹ = 2361109 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2361629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393601 + ... + 393606.

It is an arithmetic number, because the mean of its divisors is an integer number (787208).

2^2361621 is an apocalyptic number.

It is an amenable number.

2361621 is a deficient number, since it is larger than the sum of its proper divisors (787211).

2361621 is an equidigital number, since it uses as much as digits as its factorization.

2361621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787210.

The product of its digits is 432, while the sum is 21.

The square root of 2361621 is about 1536.7566495708. The cubic root of 2361621 is about 133.1690803792.

The spelling of 2361621 in words is "two million, three hundred sixty-one thousand, six hundred twenty-one".