1264801387 has 8 divisors (see below), whose sum is σ = 1276492896. Its totient is φ = 1253159232.

The previous prime is 1264801357. The next prime is 1264801397. The reversal of 1264801387 is 7831084621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264801387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264801327) 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 7 ways as a sum of consecutive naturals, for example, 40173 + ... + 64369.

It is an arithmetic number, because the mean of its divisors is an integer number (159561612).

Almost surely, 2^1264801387 is an apocalyptic number.

1264801387 is a deficient number, since it is larger than the sum of its proper divisors (11691509).

1264801387 is a wasteful number, since it uses less digits than its factorization.

1264801387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24677.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1264801387 is about 35564.0462686686. The cubic root of 1264801387 is about 1081.4524886922.

The spelling of 1264801387 in words is "one billion, two hundred sixty-four million, eight hundred one thousand, three hundred eighty-seven".