1231287 has 8 divisors (see below), whose sum is σ = 1649136. Its totient is φ = 817152.

The previous prime is 1231283. The next prime is 1231301. The reversal of 1231287 is 7821321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231287 - 2² = 1231283 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 28 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (206142).

2^1231287 is an apocalyptic number.

1231287 is a deficient number, since it is larger than the sum of its proper divisors (417849).

1231287 is a wasteful number, since it uses less digits than its factorization.

1231287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857.

The product of its digits is 672, while the sum is 24.

The square root of 1231287 is about 1109.6337233520. The cubic root of 1231287 is about 107.1814837237.

The spelling of 1231287 in words is "one million, two hundred thirty-one thousand, two hundred eighty-seven".