1287974216 has 32 divisors (see below), whose sum is σ = 2500356600. Its totient is φ = 621250560.

The previous prime is 1287974201. The next prime is 1287974243. The reversal of 1287974216 is 6124797821.

It can be written as a sum of positive squares in 4 ways, for example, as 1285509316 + 2464900 = 35854^2 + 1570^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495416 + ... + 498008.

Almost surely, 2^1287974216 is an apocalyptic number.

It is an amenable number.

1287974216 is a deficient number, since it is larger than the sum of its proper divisors (1212382384).

1287974216 is a wasteful number, since it uses less digits than its factorization.

1287974216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769 (or 4765 counting only the distinct ones).

The product of its digits is 338688, while the sum is 47.

The square root of 1287974216 is about 35888.3576665191. The cubic root of 1287974216 is about 1088.0171047808.

The spelling of 1287974216 in words is "one billion, two hundred eighty-seven million, nine hundred seventy-four thousand, two hundred sixteen".