1265443 has 2 divisors, whose sum is σ = 1265444. Its totient is φ = 1265442.

The previous prime is 1265431. The next prime is 1265449. The reversal of 1265443 is 3445621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1265443 - 2¹³ = 1257251 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1265449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632721 + 632722.

It is an arithmetic number, because the mean of its divisors is an integer number (632722).

2^1265443 is an apocalyptic number.

1265443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265443 is an equidigital number, since it uses as much as digits as its factorization.

1265443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 1265443 is about 1124.9191082029. The cubic root of 1265443 is about 108.1635325483.

The spelling of 1265443 in words is "one million, two hundred sixty-five thousand, four hundred forty-three".