1264509873 has 40 divisors (see below), whose sum is σ = 2069866656. Its totient is φ = 762955200.

The previous prime is 1264509821. The next prime is 1264509899. The reversal of 1264509873 is 3789054621.

1264509873 is a `hidden beast` number, since 1 + 2 + 64 + 509 + 87 + 3 = 666.

1264509873 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1264509873 - 2¹³ = 1264501681 is a prime.

It is a super-2 number, since 2×1264509873² = 3197970437828952258, which contains 22 as substring.

1264509873 is strictly pandigital in base 10.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1264509803) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 204558 + ... + 210648.

It is a 1-persistent number, because it is pandigital, but 2⋅1264509873 = 2529019746 is not.

It is a vampire number, since it can be written as 23067 ⋅ 54819 (with its own digits).

Almost surely, 2^1264509873 is an apocalyptic number.

It is an amenable number.

1264509873 is a deficient number, since it is larger than the sum of its proper divisors (805356783).

1264509873 is a wasteful number, since it uses less digits than its factorization.

1264509873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6347 (or 6338 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1264509873 is about 35559.9475955744. The cubic root of 1264509873 is about 1081.3693971840.

The spelling of 1264509873 in words is "one billion, two hundred sixty-four million, five hundred nine thousand, eight hundred seventy-three".