1283864 has 8 divisors (see below), whose sum is σ = 2407260. Its totient is φ = 641928.

The previous prime is 1283839. The next prime is 1283873. The reversal of 1283864 is 4683821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1283864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80234 + ... + 80249.

2^1283864 is an apocalyptic number.

It is an amenable number.

1283864 is a deficient number, since it is larger than the sum of its proper divisors (1123396).

1283864 is a wasteful number, since it uses less digits than its factorization.

1283864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160489 (or 160485 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 1283864 is about 1133.0772259648. The cubic root of 1283864 is about 108.6858502187.

The spelling of 1283864 in words is "one million, two hundred eighty-three thousand, eight hundred sixty-four".