142253538 has 16 divisors (see below), whose sum is σ = 325151040. Its totient is φ = 40643856.

The previous prime is 142253533. The next prime is 142253549. The reversal of 142253538 is 835352241.

It is a junction number, because it is equal to n+sod(n) for n = 142253499 and 142253508.

It is not an unprimeable number, because it can be changed into a prime (142253533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1693453 + ... + 1693536.

It is an arithmetic number, because the mean of its divisors is an integer number (20321940).

Almost surely, 2^142253538 is an apocalyptic number.

142253538 is an abundant number, since it is smaller than the sum of its proper divisors (182897502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142253538 is a wasteful number, since it uses less digits than its factorization.

142253538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387001.

The product of its digits is 28800, while the sum is 33.

The square root of 142253538 is about 11927.0087616301. The cubic root of 142253538 is about 522.0206609458.

The spelling of 142253538 in words is "one hundred forty-two million, two hundred fifty-three thousand, five hundred thirty-eight".