72605012 has 6 divisors (see below), whose sum is σ = 127058778. Its totient is φ = 36302504.

The previous prime is 72604991. The next prime is 72605017. The reversal of 72605012 is 21050627.

It can be written as a sum of positive squares in only one way, i.e., 72148036 + 456976 = 8494^2 + 676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72605017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9075623 + ... + 9075630.

It is an arithmetic number, because the mean of its divisors is an integer number (21176463).

Almost surely, 2^72605012 is an apocalyptic number.

It is an amenable number.

72605012 is a deficient number, since it is larger than the sum of its proper divisors (54453766).

72605012 is a wasteful number, since it uses less digits than its factorization.

72605012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18151257 (or 18151255 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 72605012 is about 8520.8574685885. The cubic root of 72605012 is about 417.1787711575.

Adding to 72605012 its reverse (21050627), we get a palindrome (93655639).

The spelling of 72605012 in words is "seventy-two million, six hundred five thousand, twelve".