142221433 has 8 divisors (see below), whose sum is σ = 144560520. Its totient is φ = 139900800.

The previous prime is 142221379. The next prime is 142221493. The reversal of 142221433 is 334122241.

It can be written as a sum of positive squares in 4 ways, for example, as 44448889 + 97772544 = 6667^2 + 9888^2 .

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 142221433 - 2¹³ = 142213241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142221493) 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, 11373 + ... + 20341.

It is an arithmetic number, because the mean of its divisors is an integer number (18070065).

Almost surely, 2^142221433 is an apocalyptic number.

It is an amenable number.

142221433 is a deficient number, since it is larger than the sum of its proper divisors (2339087).

142221433 is a wasteful number, since it uses less digits than its factorization.

142221433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9227.

The product of its digits is 1152, while the sum is 22.

The square root of 142221433 is about 11925.6627908054. The cubic root of 142221433 is about 521.9813866226.

Adding to 142221433 its reverse (334122241), we get a palindrome (476343674).

The spelling of 142221433 in words is "one hundred forty-two million, two hundred twenty-one thousand, four hundred thirty-three".