1231030 has 16 divisors (see below), whose sum is σ = 2229120. Its totient is φ = 489472.

The previous prime is 1231003. The next prime is 1231039. The reversal of 1231030 is 301321.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1230998 and 1231016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231039) 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, 2331 + ... + 2809.

It is an arithmetic number, because the mean of its divisors is an integer number (139320).

2^1231030 is an apocalyptic number.

1231030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231030 is a deficient number, since it is larger than the sum of its proper divisors (998090).

1231030 is a wasteful number, since it uses less digits than its factorization.

1231030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 1231030 is about 1109.5179133299. The cubic root of 1231030 is about 107.1740260640.

Adding to 1231030 its reverse (301321), we get a palindrome (1532351).

The spelling of 1231030 in words is "one million, two hundred thirty-one thousand, thirty".