401215775 has 12 divisors (see below), whose sum is σ = 503504232. Its totient is φ = 317103840.

The previous prime is 401215747. The next prime is 401215781. The reversal of 401215775 is 577512104.

401215775 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-401215775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94604 + ... + 98753.

It is an arithmetic number, because the mean of its divisors is an integer number (41958686).

Almost surely, 2^401215775 is an apocalyptic number.

401215775 is a deficient number, since it is larger than the sum of its proper divisors (102288457).

401215775 is a wasteful number, since it uses less digits than its factorization.

401215775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193450 (or 193445 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 401215775 is about 20030.3713145813. The cubic root of 401215775 is about 737.5520369296.

Adding to 401215775 its reverse (577512104), we get a palindrome (978727879).

The spelling of 401215775 in words is "four hundred one million, two hundred fifteen thousand, seven hundred seventy-five".