1264819 has 2 divisors, whose sum is σ = 1264820. Its totient is φ = 1264818.

The previous prime is 1264807. The next prime is 1264829. The reversal of 1264819 is 9184621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1264819 - 2⁵ = 1264787 is a prime.

It is a super-2 number, since 2×1264819² = 3199534205522, which contains 22 as substring.

It is a Chen prime.

1264819 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1264829) 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, 632409 + 632410.

It is an arithmetic number, because the mean of its divisors is an integer number (632410).

2^1264819 is an apocalyptic number.

1264819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264819 is an equidigital number, since it uses as much as digits as its factorization.

1264819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 1264819 is about 1124.6417207271. The cubic root of 1264819 is about 108.1457508593.

The spelling of 1264819 in words is "one million, two hundred sixty-four thousand, eight hundred nineteen".