1219949 has 2 divisors, whose sum is σ = 1219950. Its totient is φ = 1219948.

The previous prime is 1219931. The next prime is 1219951. The reversal of 1219949 is 9499121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 797449 + 422500 = 893^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1219949 - 2¹² = 1215853 is a prime.

Together with 1219951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1219909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609974 + 609975.

It is an arithmetic number, because the mean of its divisors is an integer number (609975).

2^1219949 is an apocalyptic number.

It is an amenable number.

1219949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219949 is an equidigital number, since it uses as much as digits as its factorization.

1219949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 35.

The square root of 1219949 is about 1104.5130148622. The cubic root of 1219949 is about 106.8514840593.

The spelling of 1219949 in words is "one million, two hundred nineteen thousand, nine hundred forty-nine".