405125431 has 2 divisors, whose sum is σ = 405125432. Its totient is φ = 405125430.

The previous prime is 405125401. The next prime is 405125437. The reversal of 405125431 is 134521504.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405125431 - 2⁹ = 405124919 is a prime.

It is a super-2 number, since 2×405125431² = 328253229685871522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405125396 and 405125405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405125437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202562715 + 202562716.

It is an arithmetic number, because the mean of its divisors is an integer number (202562716).

Almost surely, 2^405125431 is an apocalyptic number.

405125431 is a deficient number, since it is larger than the sum of its proper divisors (1).

405125431 is an equidigital number, since it uses as much as digits as its factorization.

405125431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 405125431 is about 20127.7279144965. The cubic root of 405125431 is about 739.9399945257.

Adding to 405125431 its reverse (134521504), we get a palindrome (539646935).

The spelling of 405125431 in words is "four hundred five million, one hundred twenty-five thousand, four hundred thirty-one".