1319221 has 4 divisors (see below), whose sum is σ = 1336000. Its totient is φ = 1302444.

The previous prime is 1319209. The next prime is 1319261. The reversal of 1319221 is 1229131.

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 a cyclic number.

It is not a de Polignac number, because 1319221 - 2¹³ = 1311029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1319261) 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, 8271 + ... + 8428.

It is an arithmetic number, because the mean of its divisors is an integer number (334000).

2^1319221 is an apocalyptic number.

It is an amenable number.

1319221 is a deficient number, since it is larger than the sum of its proper divisors (16779).

1319221 is an equidigital number, since it uses as much as digits as its factorization.

1319221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16778.

The product of its digits is 108, while the sum is 19.

The square root of 1319221 is about 1148.5734630401. The cubic root of 1319221 is about 109.6745476896.

It can be divided in two parts, 1319 and 221, that added together give a triangular number (1540 = T₅₅).

The spelling of 1319221 in words is "one million, three hundred nineteen thousand, two hundred twenty-one".