142240013 has 4 divisors (see below), whose sum is σ = 143621088. Its totient is φ = 140858940.

The previous prime is 142240009. The next prime is 142240039. The reversal of 142240013 is 310042241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310042241 = 2447 ⋅126703.

It is a cyclic number.

It is not a de Polignac number, because 142240013 - 2² = 142240009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142239973 and 142240000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142240613) 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, 690383 + ... + 690588.

It is an arithmetic number, because the mean of its divisors is an integer number (35905272).

Almost surely, 2^142240013 is an apocalyptic number.

It is an amenable number.

142240013 is a deficient number, since it is larger than the sum of its proper divisors (1381075).

142240013 is a wasteful number, since it uses less digits than its factorization.

142240013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381074.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 142240013 is about 11926.4417577080. The cubic root of 142240013 is about 522.0041164172.

Adding to 142240013 its reverse (310042241), we get a palindrome (452282254).

The spelling of 142240013 in words is "one hundred forty-two million, two hundred forty thousand, thirteen".