1405830 has 16 divisors (see below), whose sum is σ = 3374064. Its totient is φ = 374880.

The previous prime is 1405823. The next prime is 1405841. The reversal of 1405830 is 385041.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1405797 and 1405806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23401 + ... + 23460.

It is an arithmetic number, because the mean of its divisors is an integer number (210879).

2^1405830 is an apocalyptic number.

1405830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1405830 is an abundant number, since it is smaller than the sum of its proper divisors (1968234).

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

1405830 is a wasteful number, since it uses less digits than its factorization.

1405830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46871.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1405830 is about 1185.6770217897. The cubic root of 1405830 is about 112.0239638348.

The spelling of 1405830 in words is "one million, four hundred five thousand, eight hundred thirty".