1264387 has 2 divisors, whose sum is σ = 1264388. Its totient is φ = 1264386.

The previous prime is 1264363. The next prime is 1264411. The reversal of 1264387 is 7834621.

It is a balanced prime because it is at equal distance from previous prime (1264363) and next prime (1264411).

It is an emirp because it is prime and its reverse (7834621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264387 - 2⁷ = 1264259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632193 + 632194.

It is an arithmetic number, because the mean of its divisors is an integer number (632194).

2^1264387 is an apocalyptic number.

1264387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264387 is an equidigital number, since it uses as much as digits as its factorization.

1264387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 1264387 is about 1124.4496431588. The cubic root of 1264387 is about 108.1334370331.

The spelling of 1264387 in words is "one million, two hundred sixty-four thousand, three hundred eighty-seven".