1286242648 has 16 divisors (see below), whose sum is σ = 2416170960. Its totient is φ = 641930400.

The previous prime is 1286242589. The next prime is 1286242663. The reversal of 1286242648 is 8462426821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144268 + ... + 152923.

It is an arithmetic number, because the mean of its divisors is an integer number (151010685).

Almost surely, 2^1286242648 is an apocalyptic number.

It is an amenable number.

1286242648 is a deficient number, since it is larger than the sum of its proper divisors (1129928312).

1286242648 is a wasteful number, since it uses less digits than its factorization.

1286242648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297738 (or 297734 counting only the distinct ones).

The product of its digits is 294912, while the sum is 43.

The square root of 1286242648 is about 35864.2251833216. The cubic root of 1286242648 is about 1087.5293050279.

The spelling of 1286242648 in words is "one billion, two hundred eighty-six million, two hundred forty-two thousand, six hundred forty-eight".