401681127 has 4 divisors (see below), whose sum is σ = 535574840. Its totient is φ = 267787416.

The previous prime is 401681087. The next prime is 401681143. The reversal of 401681127 is 721186104.

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

It is not a de Polignac number, because 401681127 - 2⁷ = 401680999 is a prime.

It is a super-2 number, since 2×401681127² = 322695455575980258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401681094 and 401681103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401681197) 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, 66946852 + ... + 66946857.

It is an arithmetic number, because the mean of its divisors is an integer number (133893710).

Almost surely, 2^401681127 is an apocalyptic number.

401681127 is a deficient number, since it is larger than the sum of its proper divisors (133893713).

401681127 is a wasteful number, since it uses less digits than its factorization.

401681127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133893712.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 401681127 is about 20041.9841083661. The cubic root of 401681127 is about 737.8370778201.

It can be divided in two parts, 401 and 681127, that added together give a triangular number (681528 = T₁₁₆₇).

The spelling of 401681127 in words is "four hundred one million, six hundred eighty-one thousand, one hundred twenty-seven".