142233021 has 12 divisors (see below), whose sum is σ = 234797472. Its totient is φ = 81275976.

The previous prime is 142232983. The next prime is 142233043. The reversal of 142233021 is 120332241.

It is not a de Polignac number, because 142233021 - 2⁶ = 142232957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142232985 and 142233003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142233071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1128771 + ... + 1128896.

It is an arithmetic number, because the mean of its divisors is an integer number (19566456).

Almost surely, 2^142233021 is an apocalyptic number.

It is an amenable number.

142233021 is a deficient number, since it is larger than the sum of its proper divisors (92564451).

142233021 is a wasteful number, since it uses less digits than its factorization.

142233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257680 (or 2257677 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 142233021 is about 11926.1486239272. The cubic root of 142233021 is about 521.9955630045.

Adding to 142233021 its reverse (120332241), we get a palindrome (262565262).

It can be divided in two parts, 1422 and 33021, that added together give a palindrome (34443).

The spelling of 142233021 in words is "one hundred forty-two million, two hundred thirty-three thousand, twenty-one".