1222149 has 4 divisors (see below), whose sum is σ = 1629536. Its totient is φ = 814764.

The previous prime is 1222129. The next prime is 1222157. The reversal of 1222149 is 9412221.

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 not a de Polignac number, because 1222149 - 2¹⁶ = 1156613 is a prime.

It is a D-number.

It is a Duffinian number.

1222149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222129) 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, 203689 + ... + 203694.

It is an arithmetic number, because the mean of its divisors is an integer number (407384).

2^1222149 is an apocalyptic number.

It is an amenable number.

1222149 is a deficient number, since it is larger than the sum of its proper divisors (407387).

1222149 is an equidigital number, since it uses as much as digits as its factorization.

1222149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407386.

The product of its digits is 288, while the sum is 21.

The square root of 1222149 is about 1105.5084802931. The cubic root of 1222149 is about 106.9156758409.

The spelling of 1222149 in words is "one million, two hundred twenty-two thousand, one hundred forty-nine".