142204521 has 8 divisors (see below), whose sum is σ = 189988000. Its totient is φ = 94612032.

The previous prime is 142204519. The next prime is 142204529. The reversal of 142204521 is 125402241.

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

It is not a de Polignac number, because 142204521 - 2¹ = 142204519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142204529) 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, 46000 + ... + 48993.

It is an arithmetic number, because the mean of its divisors is an integer number (23748500).

Almost surely, 2^142204521 is an apocalyptic number.

It is an amenable number.

142204521 is a deficient number, since it is larger than the sum of its proper divisors (47783479).

142204521 is an equidigital number, since it uses as much as digits as its factorization.

142204521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95495.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 142204521 is about 11924.9537106020. The cubic root of 142204521 is about 521.9606956505.

Adding to 142204521 its reverse (125402241), we get a palindrome (267606762).

The spelling of 142204521 in words is "one hundred forty-two million, two hundred four thousand, five hundred twenty-one".