72091124 has 12 divisors (see below), whose sum is σ = 144182304. Its totient is φ = 30896184.

The previous prime is 72091121. The next prime is 72091127. The reversal of 72091124 is 42119027.

It is an interprime number because it is at equal distance from previous prime (72091121) and next prime (72091127).

72091124 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 72091093 and 72091102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72091121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287314 + ... + 1287369.

It is an arithmetic number, because the mean of its divisors is an integer number (12015192).

Almost surely, 2^72091124 is an apocalyptic number.

It is an amenable number.

72091124 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72091124 is a wasteful number, since it uses less digits than its factorization.

72091124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574694 (or 2574692 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 72091124 is about 8490.6492095717. The cubic root of 72091124 is about 416.1921957685.

The spelling of 72091124 in words is "seventy-two million, ninety-one thousand, one hundred twenty-four".