1225221 has 8 divisors (see below), whose sum is σ = 1690080. Its totient is φ = 788592.

The previous prime is 1225219. The next prime is 1225223.

1225221 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1225219) and next prime (1225223).

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

It is not a de Polignac number, because 1225221 - 2¹ = 1225219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225223) 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, 6955 + ... + 7128.

It is an arithmetic number, because the mean of its divisors is an integer number (211260).

2^1225221 is an apocalyptic number.

It is an amenable number.

1225221 is a deficient number, since it is larger than the sum of its proper divisors (464859).

1225221 is a wasteful number, since it uses less digits than its factorization.

1225221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14115.

The product of its digits is 80, while the sum is 15.

The square root of 1225221 is about 1106.8970141797. The cubic root of 1225221 is about 107.0051821521.

The spelling of 1225221 in words is "one million, two hundred twenty-five thousand, two hundred twenty-one".