1997586 has 12 divisors (see below), whose sum is σ = 4328142. Its totient is φ = 665856.

The previous prime is 1997557. The next prime is 1997587. The reversal of 1997586 is 6857991.

It can be written as a sum of positive squares in only one way, i.e., 1550025 + 447561 = 1245^2 + 669^2 .

It is not an unprimeable number, because it can be changed into a prime (1997587) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55471 + ... + 55506.

2^1997586 is an apocalyptic number.

1997586 is an abundant number, since it is smaller than the sum of its proper divisors (2330556).

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

1997586 is a wasteful number, since it uses less digits than its factorization.

1997586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110985 (or 110982 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1997586 is about 1413.3598267957. The cubic root of 1997586 is about 125.9413937576.

The spelling of 1997586 in words is "one million, nine hundred ninety-seven thousand, five hundred eighty-six".