1235221 has 6 divisors (see below), whose sum is σ = 1337730. Its totient is φ = 1140048.

The previous prime is 1235191. The next prime is 1235239. The reversal of 1235221 is 1225321.

It can be written as a sum of positive squares in 3 ways, for example, as 900 + 1234321 = 30^2 + 1111^2 .

It is not a de Polignac number, because 1235221 - 2⁷ = 1235093 is a prime.

It is a Duffinian number.

1235221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1235195 and 1235204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3486 + ... + 3823.

It is an arithmetic number, because the mean of its divisors is an integer number (222955).

2^1235221 is an apocalyptic number.

It is an amenable number.

1235221 is a deficient number, since it is larger than the sum of its proper divisors (102509).

1235221 is an equidigital number, since it uses as much as digits as its factorization.

1235221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7335 (or 7322 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 1235221 is about 1111.4049666976. The cubic root of 1235221 is about 107.2955117525.

The spelling of 1235221 in words is "one million, two hundred thirty-five thousand, two hundred twenty-one".