1231330 has 16 divisors (see below), whose sum is σ = 2255040. Its totient is φ = 483952.

The previous prime is 1231319. The next prime is 1231337. The reversal of 1231330 is 331321.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231330.

It is not an unprimeable number, because it can be changed into a prime (1231337) 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, 454 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2^1231330 is an apocalyptic number.

1231330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231330 is a deficient number, since it is larger than the sum of its proper divisors (1023710).

1231330 is a wasteful number, since it uses less digits than its factorization.

1231330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 1231330 is about 1109.6530989458. The cubic root of 1231330 is about 107.1827314020.

Adding to 1231330 its reverse (331321), we get a palindrome (1562651).

Subtracting from 1231330 its reverse (331321), we obtain a palindrome (900009).

The spelling of 1231330 in words is "one million, two hundred thirty-one thousand, three hundred thirty".