1125431 has 2 divisors, whose sum is σ = 1125432. Its totient is φ = 1125430.

The previous prime is 1125419. The next prime is 1125433. The reversal of 1125431 is 1345211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1125431 - 2¹⁸ = 863287 is a prime.

It is a super-2 number, since 2×1125431² = 2533189871522, which contains 22 as substring.

Together with 1125433, 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 (1125433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562715 + 562716.

It is an arithmetic number, because the mean of its divisors is an integer number (562716).

2^1125431 is an apocalyptic number.

1125431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125431 is an equidigital number, since it uses as much as digits as its factorization.

1125431 is an evil number, because the sum of its binary digits is even.

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

The square root of 1125431 is about 1060.8633276723. The cubic root of 1125431 is about 104.0174711772.

The spelling of 1125431 in words is "one million, one hundred twenty-five thousand, four hundred thirty-one".