2409621 has 4 divisors (see below), whose sum is σ = 3212832. Its totient is φ = 1606412.

The previous prime is 2409613. The next prime is 2409679. The reversal of 2409621 is 1269042.

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 a cyclic number.

It is not a de Polignac number, because 2409621 - 2³ = 2409613 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2409591 and 2409600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2409601) 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, 401601 + ... + 401606.

It is an arithmetic number, because the mean of its divisors is an integer number (803208).

2^2409621 is an apocalyptic number.

It is an amenable number.

2409621 is a deficient number, since it is larger than the sum of its proper divisors (803211).

2409621 is an equidigital number, since it uses as much as digits as its factorization.

2409621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803210.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2409621 is about 1552.2953971458. The cubic root of 2409621 is about 134.0652574403.

The spelling of 2409621 in words is "two million, four hundred nine thousand, six hundred twenty-one".