1264643 has 2 divisors, whose sum is σ = 1264644. Its totient is φ = 1264642.

The previous prime is 1264607. The next prime is 1264649. The reversal of 1264643 is 3464621.

It is a strong prime.

It is an emirp because it is prime and its reverse (3464621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264643 - 2⁸ = 1264387 is a prime.

It is a plaindrome in base 9.

It is not a weakly prime, because it can be changed into another prime (1264649) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632321 + 632322.

It is an arithmetic number, because the mean of its divisors is an integer number (632322).

2^1264643 is an apocalyptic number.

1264643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264643 is an equidigital number, since it uses as much as digits as its factorization.

1264643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

The square root of 1264643 is about 1124.5634708633. The cubic root of 1264643 is about 108.1407344538.

The spelling of 1264643 in words is "one million, two hundred sixty-four thousand, six hundred forty-three".