75121172 has 36 divisors (see below), whose sum is σ = 153923616. Its totient is φ = 31424400.

The previous prime is 75121171. The next prime is 75121187. The reversal of 75121172 is 27112157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75121171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51047 + ... + 52497.

It is an arithmetic number, because the mean of its divisors is an integer number (4275656).

Almost surely, 2^75121172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75121172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76961808).

75121172 is an abundant number, since it is smaller than the sum of its proper divisors (78802444).

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

75121172 is a wasteful number, since it uses less digits than its factorization.

75121172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548 (or 1503 counting only the distinct ones).

The product of its digits is 980, while the sum is 26.

The square root of 75121172 is about 8667.2470831285. The cubic root of 75121172 is about 421.9433225020.

The spelling of 75121172 in words is "seventy-five million, one hundred twenty-one thousand, one hundred seventy-two".