1287651002 has 16 divisors (see below), whose sum is σ = 2158458624. Its totient is φ = 571020000.

The previous prime is 1287650993. The next prime is 1287651017. The reversal of 1287651002 is 2001567821.

It is a self number, because there is not a number n which added to its sum of digits gives 1287651002.

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, 712874 + ... + 714677.

It is an arithmetic number, because the mean of its divisors is an integer number (134903664).

Almost surely, 2^1287651002 is an apocalyptic number.

1287651002 is a deficient number, since it is larger than the sum of its proper divisors (870807622).

1287651002 is a wasteful number, since it uses less digits than its factorization.

1287651002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427605.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1287651002 is about 35883.8543358988. The cubic root of 1287651002 is about 1087.9260854171.

The spelling of 1287651002 in words is "one billion, two hundred eighty-seven million, six hundred fifty-one thousand, two".