1285376996 has 6 divisors (see below), whose sum is σ = 2249409750. Its totient is φ = 642688496.

The previous prime is 1285376969. The next prime is 1285377001. The reversal of 1285376996 is 6996735821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 666362596 + 619014400 = 25814^2 + 24880^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160672121 + ... + 160672128.

It is an arithmetic number, because the mean of its divisors is an integer number (374901625).

Almost surely, 2^1285376996 is an apocalyptic number.

It is an amenable number.

1285376996 is a deficient number, since it is larger than the sum of its proper divisors (964032754).

1285376996 is a wasteful number, since it uses less digits than its factorization.

1285376996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321344253 (or 321344251 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 56.

The square root of 1285376996 is about 35852.1546911758. The cubic root of 1285376996 is about 1087.2852781865.

The spelling of 1285376996 in words is "one billion, two hundred eighty-five million, three hundred seventy-six thousand, nine hundred ninety-six".