142420233 has 4 divisors (see below), whose sum is σ = 189893648. Its totient is φ = 94946820.

The previous prime is 142420193. The next prime is 142420253. The reversal of 142420233 is 332024241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332024241 = 3 ⋅110674747.

It is not a de Polignac number, because 142420233 - 2¹³ = 142412041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142420253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23736703 + ... + 23736708.

It is an arithmetic number, because the mean of its divisors is an integer number (47473412).

Almost surely, 2^142420233 is an apocalyptic number.

It is an amenable number.

142420233 is a deficient number, since it is larger than the sum of its proper divisors (47473415).

142420233 is an equidigital number, since it uses as much as digits as its factorization.

142420233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47473414.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 142420233 is about 11933.9948466555. The cubic root of 142420233 is about 522.2244854403.

Adding to 142420233 its reverse (332024241), we get a palindrome (474444474).

The spelling of 142420233 in words is "one hundred forty-two million, four hundred twenty thousand, two hundred thirty-three".