109125000 has 168 divisors, whose sum is σ = 373237410. Its totient is φ = 28800000.

The previous prime is 109124993. The next prime is 109125001. The reversal of 109125000 is 521901.

It can be written as a sum of positive squares in 7 ways, for example, as 60933636 + 48191364 = 7806^2 + 6942^2 .

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 (109125001) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 1124952 + ... + 1125048.

Almost surely, 2^109125000 is an apocalyptic number.

109125000 is a gapful number since it is divisible by the number (10) 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 109125000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186618705).

109125000 is an abundant number, since it is smaller than the sum of its proper divisors (264112410).

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

109125000 is an frugal number, since it uses more digits than its factorization.

109125000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 109125000 is about 10446.2912078881. The cubic root of 109125000 is about 477.8681498821.

Adding to 109125000 its reverse (521901), we get a palindrome (109646901).

The spelling of 109125000 in words is "one hundred nine million, one hundred twenty-five thousand".