172141128 has 24 divisors (see below), whose sum is σ = 466215750. Its totient is φ = 57380352.

The previous prime is 172141117. The next prime is 172141141. The reversal of 172141128 is 821141271.

It can be written as a sum of positive squares in only one way, i.e., 97180164 + 74960964 = 9858^2 + 8658^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×172141128² = 59265135898224768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1195353 + ... + 1195496.

Almost surely, 2^172141128 is an apocalyptic number.

172141128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172141128 is an abundant number, since it is smaller than the sum of its proper divisors (294074622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172141128 is a wasteful number, since it uses less digits than its factorization.

172141128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390861 (or 2390854 counting only the distinct ones).

The product of its digits is 896, while the sum is 27.

The square root of 172141128 is about 13120.2563999337. The cubic root of 172141128 is about 556.2818387196.

Adding to 172141128 its reverse (821141271), we get a palindrome (993282399).

It can be divided in two parts, 1721 and 41128, that added together give a square (42849 = 207²).

The spelling of 172141128 in words is "one hundred seventy-two million, one hundred forty-one thousand, one hundred twenty-eight".