142499517 has 8 divisors (see below), whose sum is σ = 190348896. Its totient is φ = 94824912.

The previous prime is 142499509. The next prime is 142499519. The reversal of 142499517 is 715994241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142499517 - 2³ = 142499509 is a prime.

It is a super-2 number, since 2×142499517² = 40612224690466578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142499519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41778 + ... + 45059.

It is an arithmetic number, because the mean of its divisors is an integer number (23793612).

Almost surely, 2^142499517 is an apocalyptic number.

It is an amenable number.

142499517 is a deficient number, since it is larger than the sum of its proper divisors (47849379).

142499517 is an equidigital number, since it uses as much as digits as its factorization.

142499517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87387.

The product of its digits is 90720, while the sum is 42.

The square root of 142499517 is about 11937.3161556524. The cubic root of 142499517 is about 522.3213732783.

The spelling of 142499517 in words is "one hundred forty-two million, four hundred ninety-nine thousand, five hundred seventeen".