142401221 has 8 divisors (see below), whose sum is σ = 144641664. Its totient is φ = 140167440.

The previous prime is 142401187. The next prime is 142401229. The reversal of 142401221 is 122104241.

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 142401221 - 2¹⁰ = 142400197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142401221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142401229) 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, 57215 + ... + 59651.

It is an arithmetic number, because the mean of its divisors is an integer number (18080208).

Almost surely, 2^142401221 is an apocalyptic number.

It is an amenable number.

142401221 is a deficient number, since it is larger than the sum of its proper divisors (2240443).

142401221 is an equidigital number, since it uses as much as digits as its factorization.

142401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 142401221 is about 11933.1982720476. The cubic root of 142401221 is about 522.2012467624.

Adding to 142401221 its reverse (122104241), we get a palindrome (264505462).

The spelling of 142401221 in words is "one hundred forty-two million, four hundred one thousand, two hundred twenty-one".