72401212 has 24 divisors (see below), whose sum is σ = 137457936. Its totient is φ = 33168768.

The previous prime is 72401159. The next prime is 72401227. The reversal of 72401212 is 21210427.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 72401212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2043 + ... + 12205.

It is an arithmetic number, because the mean of its divisors is an integer number (5727414).

Almost surely, 2^72401212 is an apocalyptic number.

It is an amenable number.

72401212 is a deficient number, since it is larger than the sum of its proper divisors (65056724).

72401212 is a wasteful number, since it uses less digits than its factorization.

72401212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317 (or 10315 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 72401212 is about 8508.8901743999. The cubic root of 72401212 is about 416.7880694416.

Adding to 72401212 its reverse (21210427), we get a palindrome (93611639).

The spelling of 72401212 in words is "seventy-two million, four hundred one thousand, two hundred twelve".