1264880587 has 4 divisors (see below), whose sum is σ = 1274536296. Its totient is φ = 1255224880.

The previous prime is 1264880579. The next prime is 1264880611. The reversal of 1264880587 is 7850884621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7850884621 = 27191 ⋅288731.

It is a cyclic number.

It is not a de Polignac number, because 1264880587 - 2³ = 1264880579 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1264880587.

It is not an unprimeable number, because it can be changed into a prime (1264880387) 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, 4827658 + ... + 4827919.

It is an arithmetic number, because the mean of its divisors is an integer number (318634074).

Almost surely, 2^1264880587 is an apocalyptic number.

1264880587 is a deficient number, since it is larger than the sum of its proper divisors (9655709).

1264880587 is an equidigital number, since it uses as much as digits as its factorization.

1264880587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9655708.

The product of its (nonzero) digits is 860160, while the sum is 49.

The square root of 1264880587 is about 35565.1597353365. The cubic root of 1264880587 is about 1081.4750612084.

The spelling of 1264880587 in words is "one billion, two hundred sixty-four million, eight hundred eighty thousand, five hundred eighty-seven".