401163721 has 8 divisors (see below), whose sum is σ = 469655424. Its totient is φ = 335467680.

The previous prime is 401163691. The next prime is 401163733. The reversal of 401163721 is 127361104.

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 401163721 - 2⁷ = 401163593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401163761) 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, 698605 + ... + 699178.

It is an arithmetic number, because the mean of its divisors is an integer number (58706928).

Almost surely, 2^401163721 is an apocalyptic number.

401163721 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

401163721 is a deficient number, since it is larger than the sum of its proper divisors (68491703).

401163721 is a wasteful number, since it uses less digits than its factorization.

401163721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397831.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 401163721 is about 20029.0718956221. The cubic root of 401163721 is about 737.5201387204.

The spelling of 401163721 in words is "four hundred one million, one hundred sixty-three thousand, seven hundred twenty-one".