1230999 has 24 divisors (see below), whose sum is σ = 2074752. Its totient is φ = 630720.

The previous prime is 1230997. The next prime is 1231001. The reversal of 1230999 is 9990321.

1230999 = 290² + 291² + ... + 303².

It is an interprime number because it is at equal distance from previous prime (1230997) and next prime (1231001).

It is not a de Polignac number, because 1230999 - 2¹ = 1230997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16827 + ... + 16899.

It is an arithmetic number, because the mean of its divisors is an integer number (86448).

2^1230999 is an apocalyptic number.

1230999 is a deficient number, since it is larger than the sum of its proper divisors (843753).

1230999 is an equidigital number, since it uses as much as digits as its factorization.

1230999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 1230999 is about 1109.5039432107. The cubic root of 1230999 is about 107.1731264318.

The spelling of 1230999 in words is "one million, two hundred thirty thousand, nine hundred ninety-nine".