142430221 has 4 divisors (see below), whose sum is σ = 142933792. Its totient is φ = 141926652.

The previous prime is 142430219. The next prime is 142430231. The reversal of 142430221 is 122034241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142430221 - 2¹ = 142430219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142430231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251361 + ... + 251926.

It is an arithmetic number, because the mean of its divisors is an integer number (35733448).

Almost surely, 2^142430221 is an apocalyptic number.

It is an amenable number.

142430221 is a deficient number, since it is larger than the sum of its proper divisors (503571).

142430221 is an equidigital number, since it uses as much as digits as its factorization.

142430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503570.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142430221 is about 11934.4133077416. The cubic root of 142430221 is about 522.2366931070.

Adding to 142430221 its reverse (122034241), we get a palindrome (264464462).

The spelling of 142430221 in words is "one hundred forty-two million, four hundred thirty thousand, two hundred twenty-one".