1231284 has 12 divisors (see below), whose sum is σ = 2873024. Its totient is φ = 410424.

The previous prime is 1231283. The next prime is 1231301. The reversal of 1231284 is 4821321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1231284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51292 + ... + 51315.

2^1231284 is an apocalyptic number.

It is an amenable number.

1231284 is an abundant number, since it is smaller than the sum of its proper divisors (1641740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231284 is a wasteful number, since it uses less digits than its factorization.

1231284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102614 (or 102612 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1231284 is about 1109.6323715538. The cubic root of 1231284 is about 107.1813966753.

The spelling of 1231284 in words is "one million, two hundred thirty-one thousand, two hundred eighty-four".