172542556 has 12 divisors (see below), whose sum is σ = 302272992. Its totient is φ = 86178848.

The previous prime is 172542551. The next prime is 172542577. The reversal of 172542556 is 655245271.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18820 + ... + 26443.

It is an arithmetic number, because the mean of its divisors is an integer number (25189416).

Almost surely, 2^172542556 is an apocalyptic number.

It is an amenable number.

172542556 is a deficient number, since it is larger than the sum of its proper divisors (129730436).

172542556 is a wasteful number, since it uses less digits than its factorization.

172542556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46220 (or 46218 counting only the distinct ones).

The product of its digits is 84000, while the sum is 37.

The square root of 172542556 is about 13135.5455158893. The cubic root of 172542556 is about 556.7139139423.

The spelling of 172542556 in words is "one hundred seventy-two million, five hundred forty-two thousand, five hundred fifty-six".