72342241 has 2 divisors, whose sum is σ = 72342242. Its totient is φ = 72342240.

The previous prime is 72342233. The next prime is 72342247. The reversal of 72342241 is 14224327.

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., 52056225 + 20286016 = 7215^2 + 4504^2 .

It is a cyclic number.

It is not a de Polignac number, because 72342241 - 2³ = 72342233 is a prime.

It is not a weakly prime, because it can be changed into another prime (72342247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36171120 + 36171121.

It is an arithmetic number, because the mean of its divisors is an integer number (36171121).

Almost surely, 2^72342241 is an apocalyptic number.

It is an amenable number.

72342241 is a deficient number, since it is larger than the sum of its proper divisors (1).

72342241 is an equidigital number, since it uses as much as digits as its factorization.

72342241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 25.

The square root of 72342241 is about 8505.4242104671. The cubic root of 72342241 is about 416.6748803359.

Adding to 72342241 its reverse (14224327), we get a palindrome (86566568).

The spelling of 72342241 in words is "seventy-two million, three hundred forty-two thousand, two hundred forty-one".