142513522 has 4 divisors (see below), whose sum is σ = 213770286. Its totient is φ = 71256760.

The previous prime is 142513493. The next prime is 142513523. The reversal of 142513522 is 225315241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 141871921 + 641601 = 11911^2 + 801^2 .

It is a super-3 number, since 3×142513522³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (142513523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35628379 + ... + 35628382.

Almost surely, 2^142513522 is an apocalyptic number.

142513522 is a deficient number, since it is larger than the sum of its proper divisors (71256764).

142513522 is an equidigital number, since it uses as much as digits as its factorization.

142513522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71256763.

The product of its digits is 2400, while the sum is 25.

The square root of 142513522 is about 11937.9027471328. The cubic root of 142513522 is about 522.3384841461.

Adding to 142513522 its reverse (225315241), we get a palindrome (367828763).

The spelling of 142513522 in words is "one hundred forty-two million, five hundred thirteen thousand, five hundred twenty-two".