142890442 has 8 divisors (see below), whose sum is σ = 214640100. Its totient is φ = 71343744.

The previous prime is 142890437. The next prime is 142890443. The reversal of 142890442 is 244098241.

It can be written as a sum of positive squares in 2 ways, for example, as 141633801 + 1256641 = 11901^2 + 1121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 142890398 and 142890407.

It is not an unprimeable number, because it can be changed into a prime (142890443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48967 + ... + 51802.

Almost surely, 2^142890442 is an apocalyptic number.

142890442 is a deficient number, since it is larger than the sum of its proper divisors (71749658).

142890442 is a wasteful number, since it uses less digits than its factorization.

142890442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101480.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 142890442 is about 11953.6790152656. The cubic root of 142890442 is about 522.7985726671.

The spelling of 142890442 in words is "one hundred forty-two million, eight hundred ninety thousand, four hundred forty-two".