142049818 has 4 divisors (see below), whose sum is σ = 213074730. Its totient is φ = 71024908.

The previous prime is 142049783. The next prime is 142049819. The reversal of 142049818 is 818940241.

142049818 is digitally balanced in base 3, 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: 818940241 = 7 ⋅116991463.

It can be written as a sum of positive squares in only one way, i.e., 133564249 + 8485569 = 11557^2 + 2913^2 .

It is not an unprimeable number, because it can be changed into a prime (142049819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35512453 + ... + 35512456.

Almost surely, 2^142049818 is an apocalyptic number.

142049818 is a deficient number, since it is larger than the sum of its proper divisors (71024912).

142049818 is an equidigital number, since it uses as much as digits as its factorization.

142049818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71024911.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 142049818 is about 11918.4654213535. The cubic root of 142049818 is about 521.7713482124.

The spelling of 142049818 in words is "one hundred forty-two million, forty-nine thousand, eight hundred eighteen".