1219897 has 8 divisors (see below), whose sum is σ = 1454976. Its totient is φ = 1000032.

The previous prime is 1219891. The next prime is 1219909. The reversal of 1219897 is 7989121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1219897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3628 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (181872).

2^1219897 is an apocalyptic number.

It is an amenable number.

1219897 is a deficient number, since it is larger than the sum of its proper divisors (235079).

1219897 is an equidigital number, since it uses as much as digits as its factorization.

1219897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7607.

The product of its digits is 9072, while the sum is 37.

The square root of 1219897 is about 1104.4894748254. The cubic root of 1219897 is about 106.8499658657.

It can be divided in two parts, 1219 and 897, that added together give a square (2116 = 46²).

The spelling of 1219897 in words is "one million, two hundred nineteen thousand, eight hundred ninety-seven".