172242539 has 8 divisors (see below), whose sum is σ = 197123040. Its totient is φ = 147430656.

The previous prime is 172242523. The next prime is 172242547. The reversal of 172242539 is 935242271.

It is a happy number.

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 172242539 - 2⁴ = 172242523 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 172242499 and 172242508.

It is not an unprimeable number, because it can be changed into a prime (172242569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11654 + ... + 21915.

It is an arithmetic number, because the mean of its divisors is an integer number (24640380).

Almost surely, 2^172242539 is an apocalyptic number.

172242539 is a deficient number, since it is larger than the sum of its proper divisors (24880501).

172242539 is an equidigital number, since it uses as much as digits as its factorization.

172242539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34309.

The product of its digits is 30240, while the sum is 35.

The square root of 172242539 is about 13124.1205038662. The cubic root of 172242539 is about 556.3910553526.

The spelling of 172242539 in words is "one hundred seventy-two million, two hundred forty-two thousand, five hundred thirty-nine".