1231830 has 24 divisors (see below), whose sum is σ = 3202992. Its totient is φ = 328464.

The previous prime is 1231829. The next prime is 1231831. The reversal of 1231830 is 381321.

It is an interprime number because it is at equal distance from previous prime (1231829) and next prime (1231831).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6754 + ... + 6933.

It is an arithmetic number, because the mean of its divisors is an integer number (133458).

2^1231830 is an apocalyptic number.

1231830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231830 is an abundant number, since it is smaller than the sum of its proper divisors (1971162).

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

1231830 is a wasteful number, since it uses less digits than its factorization.

1231830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13700 (or 13697 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1231830 is about 1109.8783717147. The cubic root of 1231830 is about 107.1972371568.

It can be divided in two parts, 123 and 1830, that added together give a triangular number (1953 = T₆₂).

The spelling of 1231830 in words is "one million, two hundred thirty-one thousand, eight hundred thirty".