1265127431 has 2 divisors, whose sum is σ = 1265127432. Its totient is φ = 1265127430.

The previous prime is 1265127337. The next prime is 1265127463. The reversal of 1265127431 is 1347215621.

It is an a-pointer prime, because the next prime (1265127463) can be obtained adding 1265127431 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265127431 is a prime.

It is a super-2 number, since 2×1265127431² = 3201094833337319522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265127481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632563715 + 632563716.

It is an arithmetic number, because the mean of its divisors is an integer number (632563716).

Almost surely, 2^1265127431 is an apocalyptic number.

1265127431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265127431 is an equidigital number, since it uses as much as digits as its factorization.

1265127431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 1265127431 is about 35568.6298724030. The cubic root of 1265127431 is about 1081.5454073130.

The spelling of 1265127431 in words is "one billion, two hundred sixty-five million, one hundred twenty-seven thousand, four hundred thirty-one".