72441001 has 2 divisors, whose sum is σ = 72441002. Its totient is φ = 72441000.

The previous prime is 72440933. The next prime is 72441013. The reversal of 72441001 is 10014427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68906601 + 3534400 = 8301^2 + 1880^2 .

It is an emirp because it is prime and its reverse (10014427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72441001 - 2⁷ = 72440873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72441001.

It is not a weakly prime, because it can be changed into another prime (72441071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36220500 + 36220501.

It is an arithmetic number, because the mean of its divisors is an integer number (36220501).

Almost surely, 2^72441001 is an apocalyptic number.

It is an amenable number.

72441001 is a deficient number, since it is larger than the sum of its proper divisors (1).

72441001 is an equidigital number, since it uses as much as digits as its factorization.

72441001 is an evil number, because the sum of its binary digits is even.

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

The square root of 72441001 is about 8511.2279372603. The cubic root of 72441001 is about 416.8644058411.

Adding to 72441001 its reverse (10014427), we get a palindrome (82455428).

The spelling of 72441001 in words is "seventy-two million, four hundred forty-one thousand, one".