1287013204 has 24 divisors (see below), whose sum is σ = 2296885248. Its totient is φ = 630782880.

The previous prime is 1287013201. The next prime is 1287013207. The reversal of 1287013204 is 4023107821.

It is an interprime number because it is at equal distance from previous prime (1287013201) and next prime (1287013207).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287013201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309789 + ... + 313915.

It is an arithmetic number, because the mean of its divisors is an integer number (95703552).

Almost surely, 2^1287013204 is an apocalyptic number.

It is an amenable number.

1287013204 is a deficient number, since it is larger than the sum of its proper divisors (1009872044).

1287013204 is a wasteful number, since it uses less digits than its factorization.

1287013204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655 (or 5653 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1287013204 is about 35874.9662578239. The cubic root of 1287013204 is about 1087.7464322669.

The spelling of 1287013204 in words is "one billion, two hundred eighty-seven million, thirteen thousand, two hundred four".