1265387 has 2 divisors, whose sum is σ = 1265388. Its totient is φ = 1265386.

The previous prime is 1265377. The next prime is 1265393. The reversal of 1265387 is 7835621.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7835621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1265387 - 2¹⁰ = 1264363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1265347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632693 + 632694.

It is an arithmetic number, because the mean of its divisors is an integer number (632694).

2^1265387 is an apocalyptic number.

1265387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265387 is an equidigital number, since it uses as much as digits as its factorization.

1265387 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1265387 is about 1124.8942172489. The cubic root of 1265387 is about 108.1619369945.

It can be divided in two parts, 1265 and 387, that multiplied together give a triangular number (489555 = T₉₈₉).

The spelling of 1265387 in words is "one million, two hundred sixty-five thousand, three hundred eighty-seven".