172542489 has 32 divisors (see below), whose sum is σ = 273162240. Its totient is φ = 94785600.

The previous prime is 172542467. The next prime is 172542511. The reversal of 172542489 is 984245271.

It is an interprime number because it is at equal distance from previous prime (172542467) and next prime (172542511).

It is not a de Polignac number, because 172542489 - 2⁷ = 172542361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172542489.

It is not an unprimeable number, because it can be changed into a prime (172542449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188944 + ... + 189854.

It is an arithmetic number, because the mean of its divisors is an integer number (8536320).

Almost surely, 2^172542489 is an apocalyptic number.

It is an amenable number.

172542489 is a deficient number, since it is larger than the sum of its proper divisors (100619751).

172542489 is a wasteful number, since it uses less digits than its factorization.

172542489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261.

The product of its digits is 161280, while the sum is 42.

The square root of 172542489 is about 13135.5429655572. The cubic root of 172542489 is about 556.7138418831.

The spelling of 172542489 in words is "one hundred seventy-two million, five hundred forty-two thousand, four hundred eighty-nine".