1997574 has 12 divisors (see below), whose sum is σ = 4002084. Its totient is φ = 664704.

The previous prime is 1997557. The next prime is 1997587. The reversal of 1997574 is 4757991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3174 + ... + 3750.

It is an arithmetic number, because the mean of its divisors is an integer number (333507).

2^1997574 is an apocalyptic number.

1997574 is an abundant number, since it is smaller than the sum of its proper divisors (2004510).

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

1997574 is an frugal number, since it uses more digits than its factorization.

1997574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159 (or 582 counting only the distinct ones).

The product of its digits is 79380, while the sum is 42.

The square root of 1997574 is about 1413.3555815859. The cubic root of 1997574 is about 125.9411415699.

The spelling of 1997574 in words is "one million, nine hundred ninety-seven thousand, five hundred seventy-four".