72111461 has 2 divisors, whose sum is σ = 72111462. Its totient is φ = 72111460.

The previous prime is 72111451. The next prime is 72111469. The reversal of 72111461 is 16411127.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44222500 + 27888961 = 6650^2 + 5281^2 .

It is an emirp because it is prime and its reverse (16411127) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72111461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72111469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36055730 + 36055731.

It is an arithmetic number, because the mean of its divisors is an integer number (36055731).

Almost surely, 2^72111461 is an apocalyptic number.

It is an amenable number.

72111461 is a deficient number, since it is larger than the sum of its proper divisors (1).

72111461 is an equidigital number, since it uses as much as digits as its factorization.

72111461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

The square root of 72111461 is about 8491.8467367234. The cubic root of 72111461 is about 416.2313282092.

Adding to 72111461 its reverse (16411127), we get a palindrome (88522588).

The spelling of 72111461 in words is "seventy-two million, one hundred eleven thousand, four hundred sixty-one".