72981241 has 2 divisors, whose sum is σ = 72981242. Its totient is φ = 72981240.

The previous prime is 72981229. The next prime is 72981269. The reversal of 72981241 is 14218927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53875600 + 19105641 = 7340^2 + 4371^2 .

It is an emirp because it is prime and its reverse (14218927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72981241 - 2¹³ = 72973049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72981197 and 72981206.

It is not a weakly prime, because it can be changed into another prime (72981281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36490620 + 36490621.

It is an arithmetic number, because the mean of its divisors is an integer number (36490621).

Almost surely, 2^72981241 is an apocalyptic number.

It is an amenable number.

72981241 is a deficient number, since it is larger than the sum of its proper divisors (1).

72981241 is an equidigital number, since it uses as much as digits as its factorization.

72981241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 72981241 is about 8542.9058873430. The cubic root of 72981241 is about 417.8981173822.

The spelling of 72981241 in words is "seventy-two million, nine hundred eighty-one thousand, two hundred forty-one".