1265409023 has 2 divisors, whose sum is σ = 1265409024. Its totient is φ = 1265409022.

The previous prime is 1265409017. The next prime is 1265409037. The reversal of 1265409023 is 3209045621.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3209045621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1265409023 - 2⁴ = 1265409007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265409053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632704511 + 632704512.

It is an arithmetic number, because the mean of its divisors is an integer number (632704512).

Almost surely, 2^1265409023 is an apocalyptic number.

1265409023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265409023 is an equidigital number, since it uses as much as digits as its factorization.

1265409023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1265409023 is about 35572.5880840852. The cubic root of 1265409023 is about 1081.6256448010.

The spelling of 1265409023 in words is "one billion, two hundred sixty-five million, four hundred nine thousand, twenty-three".