142609539 has 8 divisors (see below), whose sum is σ = 191422800. Its totient is φ = 94434656.

The previous prime is 142609531. The next prime is 142609561. The reversal of 142609539 is 935906241.

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

It is a cyclic number.

It is not a de Polignac number, because 142609539 - 2³ = 142609531 is a prime.

It is a super-2 number, since 2×142609539² = 40674961227585042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142609497 and 142609506.

It is not an unprimeable number, because it can be changed into a prime (142609531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159072 + ... + 159965.

It is an arithmetic number, because the mean of its divisors is an integer number (23927850).

Almost surely, 2^142609539 is an apocalyptic number.

142609539 is a deficient number, since it is larger than the sum of its proper divisors (48813261).

142609539 is a wasteful number, since it uses less digits than its factorization.

142609539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319189.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 142609539 is about 11941.9235887691. The cubic root of 142609539 is about 522.4557645143.

The spelling of 142609539 in words is "one hundred forty-two million, six hundred nine thousand, five hundred thirty-nine".