401145131 has 4 divisors (see below), whose sum is σ = 402039000. Its totient is φ = 400251264.

The previous prime is 401145113. The next prime is 401145167. The reversal of 401145131 is 131541104.

It is a happy number.

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 401145131 - 2⁶ = 401145067 is a prime.

It is a super-2 number, since 2×401145131² = 321834832250014322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401145631) 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, 446261 + ... + 447158.

It is an arithmetic number, because the mean of its divisors is an integer number (100509750).

Almost surely, 2^401145131 is an apocalyptic number.

401145131 is a deficient number, since it is larger than the sum of its proper divisors (893869).

401145131 is an equidigital number, since it uses as much as digits as its factorization.

401145131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893868.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 401145131 is about 20028.6078148233. The cubic root of 401145131 is about 737.5087462718.

Adding to 401145131 its reverse (131541104), we get a palindrome (532686235).

The spelling of 401145131 in words is "four hundred one million, one hundred forty-five thousand, one hundred thirty-one".