142042221 has 16 divisors (see below), whose sum is σ = 213885120. Its totient is φ = 93141360.

The previous prime is 142042207. The next prime is 142042247. The reversal of 142042221 is 122240241.

It is not a de Polignac number, because 142042221 - 2¹³ = 142034029 is a prime.

It is a super-2 number, since 2×142042221² = 40351985093225682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142042194 and 142042203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142042421) 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, 41475 + ... + 44768.

It is an arithmetic number, because the mean of its divisors is an integer number (13367820).

Almost surely, 2^142042221 is an apocalyptic number.

It is an amenable number.

142042221 is a deficient number, since it is larger than the sum of its proper divisors (71842899).

142042221 is an equidigital number, since it uses as much as digits as its factorization.

142042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86313 (or 86307 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 142042221 is about 11918.1467099545. The cubic root of 142042221 is about 521.7620463875.

Adding to 142042221 its reverse (122240241), we get a palindrome (264282462).

The spelling of 142042221 in words is "one hundred forty-two million, forty-two thousand, two hundred twenty-one".