2409491 has 4 divisors (see below), whose sum is σ = 2753712. Its totient is φ = 2065272.

The previous prime is 2409487. The next prime is 2409493. The reversal of 2409491 is 1949042.

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 2409491 - 2² = 2409487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2409493) 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, 172100 + ... + 172113.

It is an arithmetic number, because the mean of its divisors is an integer number (688428).

2^2409491 is an apocalyptic number.

2409491 is a deficient number, since it is larger than the sum of its proper divisors (344221).

2409491 is an equidigital number, since it uses as much as digits as its factorization.

2409491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344220.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2409491 is about 1552.2535231076. The cubic root of 2409491 is about 134.0628464391.

The spelling of 2409491 in words is "two million, four hundred nine thousand, four hundred ninety-one".