401125031 has 2 divisors, whose sum is σ = 401125032. Its totient is φ = 401125030.

The previous prime is 401125019. The next prime is 401125033. The reversal of 401125031 is 130521104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401125031 - 2⁶ = 401124967 is a prime.

It is a super-2 number, since 2×401125031² = 321802580989501922, which contains 22 as substring.

Together with 401125033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401125033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200562515 + 200562516.

It is an arithmetic number, because the mean of its divisors is an integer number (200562516).

Almost surely, 2^401125031 is an apocalyptic number.

401125031 is a deficient number, since it is larger than the sum of its proper divisors (1).

401125031 is an equidigital number, since it uses as much as digits as its factorization.

401125031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 401125031 is about 20028.1060262822. The cubic root of 401125031 is about 737.4964280589.

Adding to 401125031 its reverse (130521104), we get a palindrome (531646135).

The spelling of 401125031 in words is "four hundred one million, one hundred twenty-five thousand, thirty-one".