1072221 has 8 divisors (see below), whose sum is σ = 1434720. Its totient is φ = 712272.

The previous prime is 1072219. The next prime is 1072229. The reversal of 1072221 is 1222701.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1072221 - 2¹ = 1072219 is a prime.

It is a super-2 number, since 2×1072221² = 2299315745682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1072221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831 + ... + 1683.

It is an arithmetic number, because the mean of its divisors is an integer number (179340).

2^1072221 is an apocalyptic number.

It is an amenable number.

1072221 is a deficient number, since it is larger than the sum of its proper divisors (362499).

1072221 is an equidigital number, since it uses as much as digits as its factorization.

1072221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1072221 is about 1035.4810476296. The cubic root of 1072221 is about 102.3516314638.

Adding to 1072221 its reverse (1222701), we get a palindrome (2294922).

The spelling of 1072221 in words is "one million, seventy-two thousand, two hundred twenty-one".