1240001409 has 8 divisors (see below), whose sum is σ = 1684530432. Its totient is φ = 811070000.

The previous prime is 1240001381. The next prime is 1240001429. The reversal of 1240001409 is 9041000421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240001409 - 2⁹ = 1240000897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240001429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3899217 + ... + 3899534.

It is an arithmetic number, because the mean of its divisors is an integer number (210566304).

Almost surely, 2^1240001409 is an apocalyptic number.

It is an amenable number.

1240001409 is a deficient number, since it is larger than the sum of its proper divisors (444529023).

1240001409 is an equidigital number, since it uses as much as digits as its factorization.

1240001409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7798807.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1240001409 is about 35213.6537297679. The cubic root of 1240001409 is about 1074.3374779084.

The spelling of 1240001409 in words is "one billion, two hundred forty million, one thousand, four hundred nine".