1722260 has 12 divisors (see below), whose sum is σ = 3616788. Its totient is φ = 688896.

The previous prime is 1722251. The next prime is 1722283. The reversal of 1722260 is 622271.

It can be written as a sum of positive squares in 2 ways, for example, as 174724 + 1547536 = 418^2 + 1244^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 86113 = 1722260 / (1 + 7 + 2 + 2 + 2 + 6 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43037 + ... + 43076.

It is an arithmetic number, because the mean of its divisors is an integer number (301399).

2^1722260 is an apocalyptic number.

1722260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1722260 is an abundant number, since it is smaller than the sum of its proper divisors (1894528).

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

1722260 is a wasteful number, since it uses less digits than its factorization.

1722260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86122 (or 86120 counting only the distinct ones).

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

The square root of 1722260 is about 1312.3490389374. The cubic root of 1722260 is about 119.8669822364.

The spelling of 1722260 in words is "one million, seven hundred twenty-two thousand, two hundred sixty".