1219997 has 4 divisors (see below), whose sum is σ = 1235520. Its totient is φ = 1204476.

The previous prime is 1219991. The next prime is 1220027. The reversal of 1219997 is 7999121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1219997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1219997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219991) 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, 7643 + ... + 7800.

It is an arithmetic number, because the mean of its divisors is an integer number (308880).

2^1219997 is an apocalyptic number.

It is an amenable number.

1219997 is a deficient number, since it is larger than the sum of its proper divisors (15523).

1219997 is an equidigital number, since it uses as much as digits as its factorization.

1219997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15522.

The product of its digits is 10206, while the sum is 38.

The square root of 1219997 is about 1104.5347436817. The cubic root of 1219997 is about 106.8528854304.

The spelling of 1219997 in words is "one million, two hundred nineteen thousand, nine hundred ninety-seven".