1264513893 has 8 divisors (see below), whose sum is σ = 1687156800. Its totient is φ = 842440128.

The previous prime is 1264513891. The next prime is 1264513931. The reversal of 1264513893 is 3983154621.

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

It is not a de Polignac number, because 1264513893 - 2¹ = 1264513891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264513891) 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, 137073 + ... + 146006.

It is an arithmetic number, because the mean of its divisors is an integer number (210894600).

Almost surely, 2^1264513893 is an apocalyptic number.

It is an amenable number.

1264513893 is a deficient number, since it is larger than the sum of its proper divisors (422642907).

1264513893 is a wasteful number, since it uses less digits than its factorization.

1264513893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284571.

The product of its digits is 155520, while the sum is 42.

The square root of 1264513893 is about 35560.0041197973. The cubic root of 1264513893 is about 1081.3705431090.

The spelling of 1264513893 in words is "one billion, two hundred sixty-four million, five hundred thirteen thousand, eight hundred ninety-three".