1287001300 has 36 divisors (see below), whose sum is σ = 3007626076. Its totient is φ = 475200000.

The previous prime is 1287001291. The next prime is 1287001307. The reversal of 1287001300 is 31007821.

It can be written as a sum of positive squares in 6 ways, for example, as 437395396 + 849605904 = 20914^2 + 29148^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287001307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 493701 + ... + 496300.

Almost surely, 2^1287001300 is an apocalyptic number.

1287001300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287001300 is an abundant number, since it is smaller than the sum of its proper divisors (1720624776).

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

1287001300 is a wasteful number, since it uses less digits than its factorization.

1287001300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990028 (or 990021 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1287001300 is about 35874.8003478765. The cubic root of 1287001300 is about 1087.7430786175.

The spelling of 1287001300 in words is "one billion, two hundred eighty-seven million, one thousand, three hundred".