72504461 has 2 divisors, whose sum is σ = 72504462. Its totient is φ = 72504460.

The previous prime is 72504457. The next prime is 72504491. The reversal of 72504461 is 16440527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45981961 + 26522500 = 6781^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 72504461 - 2² = 72504457 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72504431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36252230 + 36252231.

It is an arithmetic number, because the mean of its divisors is an integer number (36252231).

Almost surely, 2^72504461 is an apocalyptic number.

It is an amenable number.

72504461 is a deficient number, since it is larger than the sum of its proper divisors (1).

72504461 is an equidigital number, since it uses as much as digits as its factorization.

72504461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 72504461 is about 8514.9551378736. The cubic root of 72504461 is about 416.9860979480.

Adding to 72504461 its reverse (16440527), we get a palindrome (88944988).

It can be divided in two parts, 7250 and 4461, that added together give a palindrome (11711).

The spelling of 72504461 in words is "seventy-two million, five hundred four thousand, four hundred sixty-one".