172542557 has 8 divisors (see below), whose sum is σ = 190611840. Its totient is φ = 154870560.

The previous prime is 172542551. The next prime is 172542577. The reversal of 172542557 is 755245271.

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 172542557 - 2⁴ = 172542541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172542557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172542551) 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, 98408 + ... + 100145.

It is an arithmetic number, because the mean of its divisors is an integer number (23826480).

Almost surely, 2^172542557 is an apocalyptic number.

It is an amenable number.

172542557 is a deficient number, since it is larger than the sum of its proper divisors (18069283).

172542557 is a wasteful number, since it uses less digits than its factorization.

172542557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198643.

The product of its digits is 98000, while the sum is 38.

The square root of 172542557 is about 13135.5455539540. The cubic root of 172542557 is about 556.7139150178.

The spelling of 172542557 in words is "one hundred seventy-two million, five hundred forty-two thousand, five hundred fifty-seven".