102109272 has 16 divisors (see below), whose sum is σ = 255273240. Its totient is φ = 34036416.

The previous prime is 102109223. The next prime is 102109279. The reversal of 102109272 is 272901201.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 4254553 = 102109272 / (1 + 0 + 2 + 1 + 0 + 9 + 2 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102109279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2127253 + ... + 2127300.

Almost surely, 2^102109272 is an apocalyptic number.

102109272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102109272 is an abundant number, since it is smaller than the sum of its proper divisors (153163968).

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

102109272 is a wasteful number, since it uses less digits than its factorization.

102109272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254562 (or 4254558 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 102109272 is about 10104.9132603897. The cubic root of 102109272 is about 467.3996612326.

The spelling of 102109272 in words is "one hundred two million, one hundred nine thousand, two hundred seventy-two".