1240442221 has 8 divisors (see below), whose sum is σ = 1274130144. Its totient is φ = 1207200720.

The previous prime is 1240442219. The next prime is 1240442237. The reversal of 1240442221 is 1222440421.

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

It is a cyclic number.

It is not a de Polignac number, because 1240442221 - 2¹ = 1240442219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240442192 and 1240442201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240442261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105970 + ... + 117091.

It is an arithmetic number, because the mean of its divisors is an integer number (159266268).

Almost surely, 2^1240442221 is an apocalyptic number.

It is an amenable number.

1240442221 is a deficient number, since it is larger than the sum of its proper divisors (33687923).

1240442221 is an equidigital number, since it uses as much as digits as its factorization.

1240442221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223211.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1240442221 is about 35219.9122798453. The cubic root of 1240442221 is about 1074.4647693619.

Adding to 1240442221 its reverse (1222440421), we get a palindrome (2462882642).

The spelling of 1240442221 in words is "one billion, two hundred forty million, four hundred forty-two thousand, two hundred twenty-one".