142787513 has 4 divisors (see below), whose sum is σ = 155768208. Its totient is φ = 129806820.

The previous prime is 142787501. The next prime is 142787521. The reversal of 142787513 is 315787241.

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.

It is not a de Polignac number, because 142787513 - 2¹⁰ = 142786489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142789513) 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, 6490331 + ... + 6490352.

It is an arithmetic number, because the mean of its divisors is an integer number (38942052).

Almost surely, 2^142787513 is an apocalyptic number.

It is an amenable number.

142787513 is a deficient number, since it is larger than the sum of its proper divisors (12980695).

142787513 is a wasteful number, since it uses less digits than its factorization.

142787513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12980694.

The product of its digits is 47040, while the sum is 38.

The square root of 142787513 is about 11949.3729124168. The cubic root of 142787513 is about 522.6730124608.

The spelling of 142787513 in words is "one hundred forty-two million, seven hundred eighty-seven thousand, five hundred thirteen".