142930013 has 4 divisors (see below), whose sum is σ = 143146908. Its totient is φ = 142713120.

The previous prime is 142930003. The next prime is 142930043. The reversal of 142930013 is 310039241.

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 75394489 + 67535524 = 8683^2 + 8218^2 .

It is a cyclic number.

It is not a de Polignac number, because 142930013 - 2⁸ = 142929757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142930003) 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, 107456 + ... + 108777.

It is an arithmetic number, because the mean of its divisors is an integer number (35786727).

Almost surely, 2^142930013 is an apocalyptic number.

It is an amenable number.

142930013 is a deficient number, since it is larger than the sum of its proper divisors (216895).

142930013 is an equidigital number, since it uses as much as digits as its factorization.

142930013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216894.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 142930013 is about 11955.3340814885. The cubic root of 142930013 is about 522.8468281758.

Adding to 142930013 its reverse (310039241), we get a palindrome (452969254).

The spelling of 142930013 in words is "one hundred forty-two million, nine hundred thirty thousand, thirteen".