1296787284 has 36 divisors (see below), whose sum is σ = 3530144436. Its totient is φ = 399011328.

The previous prime is 1296787273. The next prime is 1296787301. The reversal of 1296787284 is 4827876921.

It is a happy number.

1296787284 is a `hidden beast` number, since 1 + 296 + 78 + 7 + 284 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 87834384 + 1208952900 = 9372^2 + 34770^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1296787284.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1384989 + ... + 1385924.

Almost surely, 2^1296787284 is an apocalyptic number.

It is an amenable number.

1296787284 is an abundant number, since it is smaller than the sum of its proper divisors (2233357152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296787284 is a wasteful number, since it uses less digits than its factorization.

1296787284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770936 (or 2770931 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 1296787284 is about 36010.9328399029. The cubic root of 1296787284 is about 1090.4930810674.

The spelling of 1296787284 in words is "one billion, two hundred ninety-six million, seven hundred eighty-seven thousand, two hundred eighty-four".