1265431 has 2 divisors, whose sum is σ = 1265432. Its totient is φ = 1265430.

The previous prime is 1265393. The next prime is 1265443. The reversal of 1265431 is 1345621.

It is a strong prime.

It is an emirp because it is prime and its reverse (1345621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1265431 - 2¹³ = 1257239 is a prime.

It is a super-2 number, since 2×1265431² = 3202631231522, which contains 22 as substring.

1265431 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632715 + 632716.

It is an arithmetic number, because the mean of its divisors is an integer number (632716).

2^1265431 is an apocalyptic number.

1265431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265431 is an equidigital number, since it uses as much as digits as its factorization.

1265431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 1265431 is about 1124.9137744734. The cubic root of 1265431 is about 108.1631906478.

The spelling of 1265431 in words is "one million, two hundred sixty-five thousand, four hundred thirty-one".