142904066 has 4 divisors (see below), whose sum is σ = 214356102. Its totient is φ = 71452032.

The previous prime is 142904063. The next prime is 142904087. The reversal of 142904066 is 660409241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660409241 = 61 ⋅10826381.

It can be written as a sum of positive squares in only one way, i.e., 137710225 + 5193841 = 11735^2 + 2279^2 .

It is not an unprimeable number, because it can be changed into a prime (142904063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35726015 + ... + 35726018.

Almost surely, 2^142904066 is an apocalyptic number.

142904066 is a deficient number, since it is larger than the sum of its proper divisors (71452036).

142904066 is an equidigital number, since it uses as much as digits as its factorization.

142904066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71452035.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 142904066 is about 11954.2488680803. The cubic root of 142904066 is about 522.8151876842.

The spelling of 142904066 in words is "one hundred forty-two million, nine hundred four thousand, sixty-six".