2197985 has 12 divisors (see below), whose sum is σ = 2733948. Its totient is φ = 1695168.

The previous prime is 2197973. The next prime is 2198003. The reversal of 2197985 is 5897912.

It can be written as a sum of positive squares in 6 ways, for example, as 271441 + 1926544 = 521^2 + 1388^2 .

It is not a de Polignac number, because 2197985 - 2¹² = 2193889 is a prime.

It is a super-2 number, since 2×2197985² = 9662276120450, which contains 22 as substring.

It is a Duffinian number.

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, 20111 + ... + 20219.

It is an arithmetic number, because the mean of its divisors is an integer number (227829).

2^2197985 is an apocalyptic number.

It is an amenable number.

2197985 is a deficient number, since it is larger than the sum of its proper divisors (535963).

2197985 is an equidigital number, since it uses as much as digits as its factorization.

2197985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 151 counting only the distinct ones).

The product of its digits is 45360, while the sum is 41.

The square root of 2197985 is about 1482.5602854522. The cubic root of 2197985 is about 130.0194251052.

The spelling of 2197985 in words is "two million, one hundred ninety-seven thousand, nine hundred eighty-five".