1270221 has 16 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 788480.

The previous prime is 1270201. The next prime is 1270231. The reversal of 1270221 is 1220721.

It is a cyclic number.

It is not a de Polignac number, because 1270221 - 2¹⁰ = 1269197 is a prime.

It is a super-2 number, since 2×1270221² = 3226922777682, which contains 22 as substring.

It is a Curzon number.

1270221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1270221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2605 + ... + 3053.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2^1270221 is an apocalyptic number.

It is an amenable number.

1270221 is a deficient number, since it is larger than the sum of its proper divisors (544179).

1270221 is a wasteful number, since it uses less digits than its factorization.

1270221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

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

The square root of 1270221 is about 1127.0408155874. The cubic root of 1270221 is about 108.2994944937.

Adding to 1270221 its reverse (1220721), we get a palindrome (2490942).

The spelling of 1270221 in words is "one million, two hundred seventy thousand, two hundred twenty-one".