142102442 has 4 divisors (see below), whose sum is σ = 213153666. Its totient is φ = 71051220.

The previous prime is 142102421. The next prime is 142102447. The reversal of 142102442 is 244201241.

142102442 is digitally balanced in base 2 and base 3, because in such bases 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: 244201241 = 9721 ⋅25121.

It can be written as a sum of positive squares in only one way, i.e., 88943761 + 53158681 = 9431^2 + 7291^2 .

It is not an unprimeable number, because it can be changed into a prime (142102447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35525609 + ... + 35525612.

Almost surely, 2^142102442 is an apocalyptic number.

142102442 is a deficient number, since it is larger than the sum of its proper divisors (71051224).

142102442 is an equidigital number, since it uses as much as digits as its factorization.

142102442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71051223.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 142102442 is about 11920.6728836924. The cubic root of 142102442 is about 521.8357723368.

Adding to 142102442 its reverse (244201241), we get a palindrome (386303683).

The spelling of 142102442 in words is "one hundred forty-two million, one hundred two thousand, four hundred forty-two".