1264881099 has 4 divisors (see below), whose sum is σ = 1686508136. Its totient is φ = 843254064.

The previous prime is 1264881071. The next prime is 1264881103. The reversal of 1264881099 is 9901884621.

1264881099 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1264881099 - 2²⁵ = 1231326667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264881799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210813514 + ... + 210813519.

It is an arithmetic number, because the mean of its divisors is an integer number (421627034).

Almost surely, 2^1264881099 is an apocalyptic number.

1264881099 is a deficient number, since it is larger than the sum of its proper divisors (421627037).

1264881099 is an equidigital number, since it uses as much as digits as its factorization.

1264881099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421627036.

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 1264881099 is about 35565.1669333914. The cubic root of 1264881099 is about 1081.4752071287.

The spelling of 1264881099 in words is "one billion, two hundred sixty-four million, eight hundred eighty-one thousand, ninety-nine".