1284764564 has 12 divisors (see below), whose sum is σ = 2251663764. Its totient is φ = 641432064.

The previous prime is 1284764543. The next prime is 1284764581. The reversal of 1284764564 is 4654674821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1275204100 + 9560464 = 35710^2 + 3092^2 .

It is a super-2 number, since 2×1284764564² = 3301239969820220192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234509 + ... + 239924.

It is an arithmetic number, because the mean of its divisors is an integer number (187638647).

Almost surely, 2^1284764564 is an apocalyptic number.

It is an amenable number.

1284764564 is a deficient number, since it is larger than the sum of its proper divisors (966899200).

1284764564 is a wasteful number, since it uses less digits than its factorization.

1284764564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475114 (or 475112 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 47.

The square root of 1284764564 is about 35843.6125969468. The cubic root of 1284764564 is about 1087.1125677459.

The spelling of 1284764564 in words is "one billion, two hundred eighty-four million, seven hundred sixty-four thousand, five hundred sixty-four".