142921073 has 4 divisors (see below), whose sum is σ = 143116788. Its totient is φ = 142725360.

The previous prime is 142921043. The next prime is 142921081. The reversal of 142921073 is 370129241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90402064 + 52519009 = 9508^2 + 7247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142921073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142921043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96758 + ... + 98223.

It is an arithmetic number, because the mean of its divisors is an integer number (35779197).

Almost surely, 2^142921073 is an apocalyptic number.

It is an amenable number.

142921073 is a deficient number, since it is larger than the sum of its proper divisors (195715).

142921073 is an equidigital number, since it uses as much as digits as its factorization.

142921073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195714.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 142921073 is about 11954.9601839571. The cubic root of 142921073 is about 522.8359269242.

The spelling of 142921073 in words is "one hundred forty-two million, nine hundred twenty-one thousand, seventy-three".