142513505 has 4 divisors (see below), whose sum is σ = 171016212. Its totient is φ = 114010800.

The previous prime is 142513493. The next prime is 142513523. The reversal of 142513505 is 505315241.

142513505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31990336 + 110523169 = 5656^2 + 10513^2 .

It is a de Polignac number, because none of the positive numbers 2^k-142513505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14251346 + ... + 14251355.

It is an arithmetic number, because the mean of its divisors is an integer number (42754053).

Almost surely, 2^142513505 is an apocalyptic number.

It is an amenable number.

142513505 is a deficient number, since it is larger than the sum of its proper divisors (28502707).

142513505 is an equidigital number, since it uses as much as digits as its factorization.

142513505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28502706.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 142513505 is about 11937.9020351149. The cubic root of 142513505 is about 522.3384633767.

Adding to 142513505 its reverse (505315241), we get a palindrome (647828746).

The spelling of 142513505 in words is "one hundred forty-two million, five hundred thirteen thousand, five hundred five".