1597220 has 12 divisors (see below), whose sum is σ = 3354204. Its totient is φ = 638880.

The previous prime is 1597187. The next prime is 1597229. The reversal of 1597220 is 227951.

It can be written as a sum of positive squares in 2 ways, for example, as 1132096 + 465124 = 1064^2 + 682^2 .

It is a super-2 number, since 2×1597220² = 5102223456800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1597220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1597229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39911 + ... + 39950.

It is an arithmetic number, because the mean of its divisors is an integer number (279517).

2^1597220 is an apocalyptic number.

1597220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1597220 is an abundant number, since it is smaller than the sum of its proper divisors (1756984).

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

1597220 is a wasteful number, since it uses less digits than its factorization.

1597220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79870 (or 79868 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1597220 is about 1263.8116948343. The cubic root of 1597220 is about 116.8929305137.

The spelling of 1597220 in words is "one million, five hundred ninety-seven thousand, two hundred twenty".