1221914 has 4 divisors (see below), whose sum is σ = 1832874. Its totient is φ = 610956.

The previous prime is 1221907. The next prime is 1221917. The reversal of 1221914 is 4191221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 779689 + 442225 = 883^2 + 665^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305477 + ... + 305480.

2^1221914 is an apocalyptic number.

1221914 is a deficient number, since it is larger than the sum of its proper divisors (610960).

1221914 is an equidigital number, since it uses as much as digits as its factorization.

1221914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610959.

The product of its digits is 144, while the sum is 20.

The square root of 1221914 is about 1105.4021892506. The cubic root of 1221914 is about 106.9088226683.

The spelling of 1221914 in words is "one million, two hundred twenty-one thousand, nine hundred fourteen".