1142245221 has 8 divisors (see below), whose sum is σ = 1640147040. Its totient is φ = 702920112.

The previous prime is 1142245213. The next prime is 1142245229. The reversal of 1142245221 is 1225422411.

It is an interprime number because it is at equal distance from previous prime (1142245213) and next prime (1142245229).

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

It is not a de Polignac number, because 1142245221 - 2³ = 1142245213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1142245191 and 1142245200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142245229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14644131 + ... + 14644208.

It is an arithmetic number, because the mean of its divisors is an integer number (205018380).

Almost surely, 2^1142245221 is an apocalyptic number.

It is an amenable number.

1142245221 is a deficient number, since it is larger than the sum of its proper divisors (497901819).

1142245221 is a wasteful number, since it uses less digits than its factorization.

1142245221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29288355.

The product of its digits is 1280, while the sum is 24.

The square root of 1142245221 is about 33797.1185310227. The cubic root of 1142245221 is about 1045.3292830734.

Adding to 1142245221 its reverse (1225422411), we get a palindrome (2367667632).

The spelling of 1142245221 in words is "one billion, one hundred forty-two million, two hundred forty-five thousand, two hundred twenty-one".