142093013 has 4 divisors (see below), whose sum is σ = 142154220. Its totient is φ = 142031808.

The previous prime is 142093009. The next prime is 142093019. The reversal of 142093013 is 310390241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310390241 = 7 ⋅44341463.

It can be written as a sum of positive squares in 2 ways, for example, as 139192804 + 2900209 = 11798^2 + 1703^2 .

It is a cyclic number.

It is not a de Polignac number, because 142093013 - 2² = 142093009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 142093013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142093019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26978 + ... + 31811.

It is an arithmetic number, because the mean of its divisors is an integer number (35538555).

Almost surely, 2^142093013 is an apocalyptic number.

It is an amenable number.

142093013 is a deficient number, since it is larger than the sum of its proper divisors (61207).

142093013 is an equidigital number, since it uses as much as digits as its factorization.

142093013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61206.

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

The square root of 142093013 is about 11920.2773877121. The cubic root of 142093013 is about 521.8242301980.

The spelling of 142093013 in words is "one hundred forty-two million, ninety-three thousand, thirteen".