401412691 has 4 divisors (see below), whose sum is σ = 403655400. Its totient is φ = 399169984.

The previous prime is 401412643. The next prime is 401412701. The reversal of 401412691 is 196214104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401412691 - 2¹¹ = 401410643 is a prime.

It is a super-2 number, since 2×401412691² = 322264296991722962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401412191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121086 + ... + 1121443.

It is an arithmetic number, because the mean of its divisors is an integer number (100913850).

Almost surely, 2^401412691 is an apocalyptic number.

401412691 is a deficient number, since it is larger than the sum of its proper divisors (2242709).

401412691 is a wasteful number, since it uses less digits than its factorization.

401412691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242708.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 401412691 is about 20035.2861471954. The cubic root of 401412691 is about 737.6726802774.

Adding to 401412691 its reverse (196214104), we get a palindrome (597626795).

The spelling of 401412691 in words is "four hundred one million, four hundred twelve thousand, six hundred ninety-one".