401215771 has 8 divisors (see below), whose sum is σ = 439308288. Its totient is φ = 363393000.

The previous prime is 401215747. The next prime is 401215781. The reversal of 401215771 is 177512104.

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 401215771 - 2¹¹ = 401213723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401215721) 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, 64315 + ... + 70276.

It is an arithmetic number, because the mean of its divisors is an integer number (54913536).

Almost surely, 2^401215771 is an apocalyptic number.

401215771 is a deficient number, since it is larger than the sum of its proper divisors (38092517).

401215771 is a wasteful number, since it uses less digits than its factorization.

401215771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134873.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 401215771 is about 20030.3712147329. The cubic root of 401215771 is about 737.5520344786.

Adding to 401215771 its reverse (177512104), we get a palindrome (578727875).

The spelling of 401215771 in words is "four hundred one million, two hundred fifteen thousand, seven hundred seventy-one".