142041221 has 8 divisors (see below), whose sum is σ = 162550080. Its totient is φ = 121586688.

The previous prime is 142041167. The next prime is 142041247. The reversal of 142041221 is 122140241.

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 142041221 - 2⁶ = 142041157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 142041221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142041281) 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, 7811 + ... + 18576.

It is an arithmetic number, because the mean of its divisors is an integer number (20318760).

Almost surely, 2^142041221 is an apocalyptic number.

It is an amenable number.

142041221 is a deficient number, since it is larger than the sum of its proper divisors (20508859).

142041221 is an equidigital number, since it uses as much as digits as its factorization.

142041221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27163.

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

The square root of 142041221 is about 11918.1047570493. The cubic root of 142041221 is about 521.7608219551.

Adding to 142041221 its reverse (122140241), we get a palindrome (264181462).

The spelling of 142041221 in words is "one hundred forty-two million, forty-one thousand, two hundred twenty-one".