1219491 has 24 divisors (see below), whose sum is σ = 2169440. Its totient is φ = 642816.

The previous prime is 1219489. The next prime is 1219501. The reversal of 1219491 is 1949121.

It is not a de Polignac number, because 1219491 - 2¹ = 1219489 is a prime.

1219491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1219411) 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 23 ways as a sum of consecutive naturals, for example, 75 + ... + 1563.

2^1219491 is an apocalyptic number.

1219491 is a deficient number, since it is larger than the sum of its proper divisors (949949).

1219491 is a wasteful number, since it uses less digits than its factorization.

1219491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1512 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 1219491 is about 1104.3056642072. The cubic root of 1219491 is about 106.8381107939.

It can be divided in two parts, 121 and 9491, that multiplied together give a palindrome (1148411).

The spelling of 1219491 in words is "one million, two hundred nineteen thousand, four hundred ninety-one".