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72132025 = 5272317921
BaseRepresentation
bin1000100110010…
…10010110111001
312000201200112111
410103022112321
5121431211100
611054012321
71534053310
oct423122671
9160650474
1072132025
1137797949
12201a70a1
1311c37094
149819277
1564ec6ba
hex44ca5b9

72132025 has 24 divisors (see below), whose sum is σ = 106671744. Its totient is φ = 47308800.

The previous prime is 72132001. The next prime is 72132029. The reversal of 72132025 is 52023127.

It is not a de Polignac number, because 72132025 - 211 = 72129977 is a prime.

It is a super-3 number, since 3×721320253 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72131987 and 72132005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72132029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4936 + ... + 12985.

It is an arithmetic number, because the mean of its divisors is an integer number (4444656).

Almost surely, 272132025 is an apocalyptic number.

It is an amenable number.

72132025 is a deficient number, since it is larger than the sum of its proper divisors (34539719).

72132025 is a wasteful number, since it uses less digits than its factorization.

72132025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17961 (or 17956 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 72132025 is about 8493.0574588896. The cubic root of 72132025 is about 416.2708899627.

The spelling of 72132025 in words is "seventy-two million, one hundred thirty-two thousand, twenty-five".

Divisors: 1 5 7 23 25 35 115 161 175 575 805 4025 17921 89605 125447 412183 448025 627235 2060915 2885281 3136175 10304575 14426405 72132025