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72499 = 710357
BaseRepresentation
bin10001101100110011
310200110011
4101230303
54304444
61315351
7421240
oct215463
9120404
1072499
114a519
1235b57
1326ccb
141c5c7
1516734
hex11b33

72499 has 4 divisors (see below), whose sum is σ = 82864. Its totient is φ = 62136.

The previous prime is 72497. The next prime is 72503. The reversal of 72499 is 99427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99427 = 195233.

It is a cyclic number.

It is not a de Polignac number, because 72499 - 21 = 72497 is a prime.

It is a super-2 number, since 2×724992 = 10512210002, which contains 22 as substring.

It is a Duffinian number.

72499 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 72499.

It is not an unprimeable number, because it can be changed into a prime (72493) 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, 5172 + ... + 5185.

It is an arithmetic number, because the mean of its divisors is an integer number (20716).

272499 is an apocalyptic number.

72499 is a deficient number, since it is larger than the sum of its proper divisors (10365).

72499 is a wasteful number, since it uses less digits than its factorization.

72499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364.

The product of its digits is 4536, while the sum is 31.

The square root of 72499 is about 269.2563833969. The cubic root of 72499 is about 41.6975628623.

The spelling of 72499 in words is "seventy-two thousand, four hundred ninety-nine".

Divisors: 1 7 10357 72499