401020131 has 4 divisors (see below), whose sum is σ = 534693512. Its totient is φ = 267346752.

The previous prime is 401020129. The next prime is 401020159. The reversal of 401020131 is 131020104.

It is a happy number.

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

It is not a de Polignac number, because 401020131 - 2¹ = 401020129 is a prime.

It is a super-2 number, since 2×401020131² = 321634290934514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401020181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66836686 + ... + 66836691.

It is an arithmetic number, because the mean of its divisors is an integer number (133673378).

Almost surely, 2^401020131 is an apocalyptic number.

401020131 is a deficient number, since it is larger than the sum of its proper divisors (133673381).

401020131 is a wasteful number, since it uses less digits than its factorization.

401020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133673380.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 401020131 is about 20025.4870352758. The cubic root of 401020131 is about 737.4321337914.

Adding to 401020131 its reverse (131020104), we get a palindrome (532040235).

The spelling of 401020131 in words is "four hundred one million, twenty thousand, one hundred thirty-one".