1742220 has 36 divisors (see below), whose sum is σ = 5285280. Its totient is φ = 464544.

The previous prime is 1742197. The next prime is 1742249. The reversal of 1742220 is 222471.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1742193 and 1742202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4660 + ... + 5019.

2^1742220 is an apocalyptic number.

1742220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1742220 is an abundant number, since it is smaller than the sum of its proper divisors (3543060).

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

1742220 is a wasteful number, since it uses less digits than its factorization.

1742220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9694 (or 9689 counting only the distinct ones).

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

The square root of 1742220 is about 1319.9318164208. The cubic root of 1742220 is about 120.3282678496.

Adding to 1742220 its reverse (222471), we get a palindrome (1964691).

The spelling of 1742220 in words is "one million, seven hundred forty-two thousand, two hundred twenty".