100061172 has 72 divisors (see below), whose sum is σ = 265961696. Its totient is φ = 31679424.

The previous prime is 100061131. The next prime is 100061177. The reversal of 100061172 is 271160001.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100061177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56403 + ... + 58149.

Almost surely, 2^100061172 is an apocalyptic number.

100061172 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 100061172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132980848).

100061172 is an abundant number, since it is smaller than the sum of its proper divisors (165900524).

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

100061172 is a wasteful number, since it uses less digits than its factorization.

100061172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837 (or 1832 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 100061172 is about 10003.0581323913. The cubic root of 100061172 is about 464.2535091598.

The spelling of 100061172 in words is "one hundred million, sixty-one thousand, one hundred seventy-two".