142981273 has 4 divisors (see below), whose sum is σ = 144246708. Its totient is φ = 141715840.

The previous prime is 142981261. The next prime is 142981277. The reversal of 142981273 is 372189241.

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 35485849 + 107495424 = 5957^2 + 10368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142981273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142981277) 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, 632548 + ... + 632773.

It is an arithmetic number, because the mean of its divisors is an integer number (36061677).

Almost surely, 2^142981273 is an apocalyptic number.

It is an amenable number.

142981273 is a deficient number, since it is larger than the sum of its proper divisors (1265435).

142981273 is a wasteful number, since it uses less digits than its factorization.

142981273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265434.

The product of its digits is 24192, while the sum is 37.

The square root of 142981273 is about 11957.4777022581. The cubic root of 142981273 is about 522.9093247888.

The spelling of 142981273 in words is "one hundred forty-two million, nine hundred eighty-one thousand, two hundred seventy-three".