2401409 has 2 divisors, whose sum is σ = 2401410. Its totient is φ = 2401408.

The previous prime is 2401393. The next prime is 2401423. The reversal of 2401409 is 9041042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1555009 + 846400 = 1247^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 2401409 - 2⁴ = 2401393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2401489) 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 as a sum of consecutive naturals, namely, 1200704 + 1200705.

It is an arithmetic number, because the mean of its divisors is an integer number (1200705).

2^2401409 is an apocalyptic number.

It is an amenable number.

2401409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2401409 is an equidigital number, since it uses as much as digits as its factorization.

2401409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2401409 is about 1549.6480245527. The cubic root of 2401409 is about 133.9127857526.

The spelling of 2401409 in words is "two million, four hundred one thousand, four hundred nine".