72125623 has 4 divisors (see below), whose sum is σ = 74452288. Its totient is φ = 69798960.

The previous prime is 72125621. The next prime is 72125687. The reversal of 72125623 is 32652127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72125623 - 2¹ = 72125621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72125591 and 72125600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72125621) 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 3 ways as a sum of consecutive naturals, for example, 1163286 + ... + 1163347.

It is an arithmetic number, because the mean of its divisors is an integer number (18613072).

Almost surely, 2^72125623 is an apocalyptic number.

72125623 is a deficient number, since it is larger than the sum of its proper divisors (2326665).

72125623 is a wasteful number, since it uses less digits than its factorization.

72125623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326664.

The product of its digits is 5040, while the sum is 28.

The square root of 72125623 is about 8492.6805544539. The cubic root of 72125623 is about 416.2585743739.

The spelling of 72125623 in words is "seventy-two million, one hundred twenty-five thousand, six hundred twenty-three".