401015995 has 16 divisors (see below), whose sum is σ = 507054240. Its totient is φ = 303623424.

The previous prime is 401015959. The next prime is 401015999. The reversal of 401015995 is 599510104.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 401015995 - 2¹⁵ = 400983227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401015995.

It is not an unprimeable number, because it can be changed into a prime (401015999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151927 + ... + 154543.

It is an arithmetic number, because the mean of its divisors is an integer number (31690890).

Almost surely, 2^401015995 is an apocalyptic number.

401015995 is a deficient number, since it is larger than the sum of its proper divisors (106038245).

401015995 is a wasteful number, since it uses less digits than its factorization.

401015995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 401015995 is about 20025.3837666098. The cubic root of 401015995 is about 737.4295985656.

The spelling of 401015995 in words is "four hundred one million, fifteen thousand, nine hundred ninety-five".