1264687 has 2 divisors, whose sum is σ = 1264688. Its totient is φ = 1264686.

The previous prime is 1264667. The next prime is 1264699. The reversal of 1264687 is 7864621.

It is a strong prime.

It is an emirp because it is prime and its reverse (7864621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264687 - 2⁷ = 1264559 is a prime.

1264687 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264607) 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, 632343 + 632344.

It is an arithmetic number, because the mean of its divisors is an integer number (632344).

2^1264687 is an apocalyptic number.

1264687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264687 is an equidigital number, since it uses as much as digits as its factorization.

1264687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 1264687 is about 1124.5830338397. The cubic root of 1264687 is about 108.1419885988.

The spelling of 1264687 in words is "one million, two hundred sixty-four thousand, six hundred eighty-seven".