1706420 has 24 divisors (see below), whose sum is σ = 3672648. Its totient is φ = 665600.

The previous prime is 1706417. The next prime is 1706437. The reversal of 1706420 is 246071.

It can be written as a sum of positive squares in 4 ways, for example, as 784 + 1705636 = 28^2 + 1306^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1706392 and 1706401.

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, 221 + ... + 1860.

It is an arithmetic number, because the mean of its divisors is an integer number (153027).

2^1706420 is an apocalyptic number.

1706420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1706420 is an abundant number, since it is smaller than the sum of its proper divisors (1966228).

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

1706420 is a wasteful number, since it uses less digits than its factorization.

1706420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1706420 is about 1306.3001186557. The cubic root of 1706420 is about 119.4983689372.

The spelling of 1706420 in words is "one million, seven hundred six thousand, four hundred twenty".