1264580385 has 8 divisors (see below), whose sum is σ = 2023328640. Its totient is φ = 674442864.

The previous prime is 1264580363. The next prime is 1264580389. The reversal of 1264580385 is 5830854621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1264580385 - 2⁵ = 1264580353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264580389) 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 7 ways as a sum of consecutive naturals, for example, 42152665 + ... + 42152694.

It is an arithmetic number, because the mean of its divisors is an integer number (252916080).

Almost surely, 2^1264580385 is an apocalyptic number.

1264580385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264580385 is a deficient number, since it is larger than the sum of its proper divisors (758748255).

1264580385 is an equidigital number, since it uses as much as digits as its factorization.

1264580385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84305367.

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 1264580385 is about 35560.9390342831. The cubic root of 1264580385 is about 1081.3894966981.

The spelling of 1264580385 in words is "one billion, two hundred sixty-four million, five hundred eighty thousand, three hundred eighty-five".