401231 has 2 divisors, whose sum is σ = 401232. Its totient is φ = 401230.

The previous prime is 401209. The next prime is 401237. The reversal of 401231 is 132104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401231 - 2¹⁰ = 400207 is a prime.

It is a super-2 number, since 2×401231² = 321972630722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200615 + 200616.

It is an arithmetic number, because the mean of its divisors is an integer number (200616).

2⁴⁰¹²³¹ is an apocalyptic number.

401231 is a deficient number, since it is larger than the sum of its proper divisors (1).

401231 is an equidigital number, since it uses as much as digits as its factorization.

401231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 401231 is about 633.4279753847. The cubic root of 401231 is about 73.7561366147.

Adding to 401231 its reverse (132104), we get a palindrome (533335).

The spelling of 401231 in words is "four hundred one thousand, two hundred thirty-one".