101240172 has 96 divisors (see below), whose sum is σ = 295680000. Its totient is φ = 29678400.

The previous prime is 101240171. The next prime is 101240197. The reversal of 101240172 is 271042101.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (101240171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35454 + ... + 38202.

It is an arithmetic number, because the mean of its divisors is an integer number (3080000).

Almost surely, 2^101240172 is an apocalyptic number.

101240172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101240172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147840000).

101240172 is an abundant number, since it is smaller than the sum of its proper divisors (194439828).

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

101240172 is a wasteful number, since it uses less digits than its factorization.

101240172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804 (or 2796 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 101240172 is about 10061.8175296514. The cubic root of 101240172 is about 466.0697949700.

Adding to 101240172 its reverse (271042101), we get a palindrome (372282273).

The spelling of 101240172 in words is "one hundred one million, two hundred forty thousand, one hundred seventy-two".