401139131 has 4 divisors (see below), whose sum is σ = 410467992. Its totient is φ = 391810272.

The previous prime is 401139119. The next prime is 401139173. The reversal of 401139131 is 131931104.

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 401139131 - 2¹⁴ = 401122747 is a prime.

It is a super-2 number, since 2×401139131² = 321825204838870322, 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 = 401139097 and 401139106.

It is not an unprimeable number, because it can be changed into a prime (401139181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4664366 + ... + 4664451.

It is an arithmetic number, because the mean of its divisors is an integer number (102616998).

Almost surely, 2^401139131 is an apocalyptic number.

401139131 is a deficient number, since it is larger than the sum of its proper divisors (9328861).

401139131 is an equidigital number, since it uses as much as digits as its factorization.

401139131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9328860.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 401139131 is about 20028.4580285153. The cubic root of 401139131 is about 737.5050692364.

The spelling of 401139131 in words is "four hundred one million, one hundred thirty-nine thousand, one hundred thirty-one".