1305830 has 16 divisors (see below), whose sum is σ = 2386800. Its totient is φ = 514272.

The previous prime is 1305823. The next prime is 1305869. The reversal of 1305830 is 385031.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305 + ... + 1644.

It is an arithmetic number, because the mean of its divisors is an integer number (149175).

2^1305830 is an apocalyptic number.

1305830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1305830 is a deficient number, since it is larger than the sum of its proper divisors (1080970).

1305830 is a wasteful number, since it uses less digits than its factorization.

1305830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1305830 is about 1142.7291892658. The cubic root of 1305830 is about 109.3021942685.

The spelling of 1305830 in words is "one million, three hundred five thousand, eight hundred thirty".