142123213 has 16 divisors (see below), whose sum is σ = 154915200. Its totient is φ = 129862656.

The previous prime is 142123199. The next prime is 142123237. The reversal of 142123213 is 312321241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 142123213 - 2¹³ = 142115021 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 (142153213) 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, 144981 + ... + 145957.

It is an arithmetic number, because the mean of its divisors is an integer number (9682200).

Almost surely, 2^142123213 is an apocalyptic number.

It is an amenable number.

142123213 is a deficient number, since it is larger than the sum of its proper divisors (12791987).

142123213 is a wasteful number, since it uses less digits than its factorization.

142123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 288, while the sum is 19.

The square root of 142123213 is about 11921.5440694568. The cubic root of 142123213 is about 521.8611965369.

Adding to 142123213 its reverse (312321241), we get a palindrome (454444454).

The spelling of 142123213 in words is "one hundred forty-two million, one hundred twenty-three thousand, two hundred thirteen".