142240928 has 12 divisors (see below), whose sum is σ = 280036890. Its totient is φ = 71120448.

The previous prime is 142240919. The next prime is 142240949. The reversal of 142240928 is 829042241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 130599184 + 11641744 = 11428^2 + 3412^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 4445029 = 142240928 / (1 + 4 + 2 + 2 + 4 + 0 + 9 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 142240894 and 142240903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222483 + ... + 2222546.

Almost surely, 2^142240928 is an apocalyptic number.

It is an amenable number.

142240928 is a deficient number, since it is larger than the sum of its proper divisors (137795962).

142240928 is an equidigital number, since it uses as much as digits as its factorization.

142240928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445039 (or 4445031 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 142240928 is about 11926.4801177883. The cubic root of 142240928 is about 522.0052357289.

The spelling of 142240928 in words is "one hundred forty-two million, two hundred forty thousand, nine hundred twenty-eight".