142515757129 has 4 divisors (see below), whose sum is σ = 142518922884. Its totient is φ = 142512591376.

The previous prime is 142515757123. The next prime is 142515757169. The reversal of 142515757129 is 921757515241.

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 55637015625 + 86878741504 = 235875^2 + 294752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142515757129 is a prime.

It is a super-2 number, since 2×142515757129² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142515757123) 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, 1514362 + ... + 1605715.

It is an arithmetic number, because the mean of its divisors is an integer number (35629730721).

Almost surely, 2^142515757129 is an apocalyptic number.

It is an amenable number.

142515757129 is a deficient number, since it is larger than the sum of its proper divisors (3165755).

142515757129 is an equidigital number, since it uses as much as digits as its factorization.

142515757129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165754.

The product of its digits is 882000, while the sum is 49.

The spelling of 142515757129 in words is "one hundred forty-two billion, five hundred fifteen million, seven hundred fifty-seven thousand, one hundred twenty-nine".