401123881 has 4 divisors (see below), whose sum is σ = 401948032. Its totient is φ = 400299732.

The previous prime is 401123867. The next prime is 401123903. The reversal of 401123881 is 188321104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401123881 - 2⁷ = 401123753 is a prime.

It is a super-2 number, since 2×401123881² = 321800735817004322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401123581) 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, 411345 + ... + 412318.

It is an arithmetic number, because the mean of its divisors is an integer number (100487008).

Almost surely, 2^401123881 is an apocalyptic number.

It is an amenable number.

401123881 is a deficient number, since it is larger than the sum of its proper divisors (824151).

401123881 is an equidigital number, since it uses as much as digits as its factorization.

401123881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824150.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 401123881 is about 20028.0773166073. The cubic root of 401123881 is about 737.4957232731.

Adding to 401123881 its reverse (188321104), we get a palindrome (589444985).

The spelling of 401123881 in words is "four hundred one million, one hundred twenty-three thousand, eight hundred eighty-one".