1240221 has 8 divisors (see below), whose sum is σ = 1674880. Its totient is φ = 816192.

The previous prime is 1240219. The next prime is 1240231. The reversal of 1240221 is 1220421.

1240221 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

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

It is not a de Polignac number, because 1240221 - 2¹ = 1240219 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1240197 and 1240206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240231) 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, 2380 + ... + 2853.

It is an arithmetic number, because the mean of its divisors is an integer number (209360).

2^1240221 is an apocalyptic number.

It is an amenable number.

1240221 is a deficient number, since it is larger than the sum of its proper divisors (434659).

1240221 is an equidigital number, since it uses as much as digits as its factorization.

1240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5315.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1240221 is about 1113.6521000743. The cubic root of 1240221 is about 107.4400892061.

Adding to 1240221 its reverse (1220421), we get a palindrome (2460642).

The spelling of 1240221 in words is "one million, two hundred forty thousand, two hundred twenty-one".