1320830 has 16 divisors (see below), whose sum is σ = 2717280. Its totient is φ = 452832.

The previous prime is 1320811. The next prime is 1320859. The reversal of 1320830 is 380231.

1320830 = 177² + 178² + ... + 211².

It is a junction number, because it is equal to n+sod(n) for n = 1320799 and 1320808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9365 + ... + 9504.

It is an arithmetic number, because the mean of its divisors is an integer number (169830).

2^1320830 is an apocalyptic number.

1320830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320830 is an abundant number, since it is smaller than the sum of its proper divisors (1396450).

1320830 is a wasteful number, since it uses less digits than its factorization.

1320830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18883.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1320830 is about 1149.2736836803. The cubic root of 1320830 is about 109.7191180972.

The spelling of 1320830 in words is "one million, three hundred twenty thousand, eight hundred thirty".