1019221 has 4 divisors (see below), whose sum is σ = 1164832. Its totient is φ = 873612.

The previous prime is 1019209. The next prime is 1019237. The reversal of 1019221 is 1229101.

1019221 = T₃₀₁ + T₃₀₂ + ... + T₃₂₁.

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 1019221 - 2⁷ = 1019093 is a prime.

It is a super-2 number, since 2×1019221² = 2077622893682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1019195 and 1019204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1019251) 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, 72795 + ... + 72808.

It is an arithmetic number, because the mean of its divisors is an integer number (291208).

2^1019221 is an apocalyptic number.

It is an amenable number.

1019221 is a deficient number, since it is larger than the sum of its proper divisors (145611).

1019221 is an equidigital number, since it uses as much as digits as its factorization.

1019221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145610.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1019221 is about 1009.5647577050. The cubic root of 1019221 is about 100.6366383154.

The spelling of 1019221 in words is "one million, nineteen thousand, two hundred twenty-one".