142221013 has 16 divisors (see below), whose sum is σ = 159252480. Its totient is φ = 125902000.

The previous prime is 142220999. The next prime is 142221019. The reversal of 142221013 is 310122241.

It is a cyclic number.

It is not a de Polignac number, because 142221013 - 2⁹ = 142220501 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 (142221019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122988 + ... + 124138.

It is an arithmetic number, because the mean of its divisors is an integer number (9953280).

Almost surely, 2^142221013 is an apocalyptic number.

It is an amenable number.

142221013 is a deficient number, since it is larger than the sum of its proper divisors (17031467).

142221013 is a wasteful number, since it uses less digits than its factorization.

142221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 142221013 is about 11925.6451817082. The cubic root of 142221013 is about 521.9808727939.

Adding to 142221013 its reverse (310122241), we get a palindrome (452343254).

The spelling of 142221013 in words is "one hundred forty-two million, two hundred twenty-one thousand, thirteen".