142238045 has 4 divisors (see below), whose sum is σ = 170685660. Its totient is φ = 113790432.

The previous prime is 142237993. The next prime is 142238059. The reversal of 142238045 is 540832241.

It is a happy number.

142238045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540832241 = 67 ⋅8072123.

It can be written as a sum of positive squares in 2 ways, for example, as 108388921 + 33849124 = 10411^2 + 5818^2 .

It is a cyclic number.

It is not a de Polignac number, because 142238045 - 2⁸ = 142237789 is a prime.

It is a super-2 number, since 2×142238045² = 40463322890844050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142237999 and 142238017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14223800 + ... + 14223809.

It is an arithmetic number, because the mean of its divisors is an integer number (42671415).

Almost surely, 2^142238045 is an apocalyptic number.

It is an amenable number.

142238045 is a deficient number, since it is larger than the sum of its proper divisors (28447615).

142238045 is an equidigital number, since it uses as much as digits as its factorization.

142238045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28447614.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 142238045 is about 11926.3592516744. The cubic root of 142238045 is about 522.0017089632.

The spelling of 142238045 in words is "one hundred forty-two million, two hundred thirty-eight thousand, forty-five".