1264553867 has 4 divisors (see below), whose sum is σ = 1265103840. Its totient is φ = 1264003896.

The previous prime is 1264553863. The next prime is 1264553881. The reversal of 1264553867 is 7683554621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7683554621 = 16927 ⋅453923.

It is a cyclic number.

It is not a de Polignac number, because 1264553867 - 2² = 1264553863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264553861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271523 + ... + 276140.

It is an arithmetic number, because the mean of its divisors is an integer number (316275960).

Almost surely, 2^1264553867 is an apocalyptic number.

1264553867 is a deficient number, since it is larger than the sum of its proper divisors (549973).

1264553867 is an equidigital number, since it uses as much as digits as its factorization.

1264553867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549972.

The product of its digits is 1209600, while the sum is 47.

The square root of 1264553867 is about 35560.5661794072. The cubic root of 1264553867 is about 1081.3819378041.

The spelling of 1264553867 in words is "one billion, two hundred sixty-four million, five hundred fifty-three thousand, eight hundred sixty-seven".