1704420 has 72 divisors (see below), whose sum is σ = 5484024. Its totient is φ = 427008.

The previous prime is 1704407. The next prime is 1704421. The reversal of 1704420 is 244071.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 86436 + 1617984 = 294^2 + 1272^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1704393 and 1704402.

It is not an unprimeable number, because it can be changed into a prime (1704421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2782 + ... + 3338.

It is an arithmetic number, because the mean of its divisors is an integer number (76167).

2^1704420 is an apocalyptic number.

1704420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1704420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2742012).

1704420 is an abundant number, since it is smaller than the sum of its proper divisors (3779604).

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

1704420 is a wasteful number, since it uses less digits than its factorization.

1704420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1704420 is about 1305.5343733506. The cubic root of 1704420 is about 119.4516648881.

Adding to 1704420 its reverse (244071), we get a palindrome (1948491).

The spelling of 1704420 in words is "one million, seven hundred four thousand, four hundred twenty".