401240009 has 8 divisors (see below), whose sum is σ = 414342720. Its totient is φ = 388308816.

The previous prime is 401239939. The next prime is 401240029. The reversal of 401240009 is 900042104.

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 401240009 - 2⁸ = 401239753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401240029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38117 + ... + 47490.

It is an arithmetic number, because the mean of its divisors is an integer number (51792840).

Almost surely, 2^401240009 is an apocalyptic number.

It is an amenable number.

401240009 is a deficient number, since it is larger than the sum of its proper divisors (13102711).

401240009 is a wasteful number, since it uses less digits than its factorization.

401240009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85759.

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

The square root of 401240009 is about 20030.9762368188. The cubic root of 401240009 is about 737.5668863592.

The spelling of 401240009 in words is "four hundred one million, two hundred forty thousand, nine".