2261409 has 4 divisors (see below), whose sum is σ = 3015216. Its totient is φ = 1507604.

The previous prime is 2261407. The next prime is 2261447. The reversal of 2261409 is 9041622.

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 2261409 - 2¹ = 2261407 is a prime.

It is a super-2 number, since 2×2261409² = 10227941330562, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2261407) 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, 376899 + ... + 376904.

It is an arithmetic number, because the mean of its divisors is an integer number (753804).

2^2261409 is an apocalyptic number.

It is an amenable number.

2261409 is a deficient number, since it is larger than the sum of its proper divisors (753807).

2261409 is an equidigital number, since it uses as much as digits as its factorization.

2261409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753806.

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

The square root of 2261409 is about 1503.7981912477. The cubic root of 2261409 is about 131.2581781752.

The spelling of 2261409 in words is "two million, two hundred sixty-one thousand, four hundred nine".