1264264091 has 4 divisors (see below), whose sum is σ = 1264337352. Its totient is φ = 1264190832.

The previous prime is 1264264081. The next prime is 1264264121. The reversal of 1264264091 is 1904624621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264264091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264264081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5111 + ... + 50543.

It is an arithmetic number, because the mean of its divisors is an integer number (316084338).

Almost surely, 2^1264264091 is an apocalyptic number.

1264264091 is a deficient number, since it is larger than the sum of its proper divisors (73261).

1264264091 is an equidigital number, since it uses as much as digits as its factorization.

1264264091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73260.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1264264091 is about 35556.4915451455. The cubic root of 1264264091 is about 1081.2993309445.

The spelling of 1264264091 in words is "one billion, two hundred sixty-four million, two hundred sixty-four thousand, ninety-one".