74272241 has 2 divisors, whose sum is σ = 74272242. Its totient is φ = 74272240.

The previous prime is 74272217. The next prime is 74272243. The reversal of 74272241 is 14227247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63936016 + 10336225 = 7996^2 + 3215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74272241 is a prime.

Together with 74272243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74272243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37136120 + 37136121.

It is an arithmetic number, because the mean of its divisors is an integer number (37136121).

Almost surely, 2^74272241 is an apocalyptic number.

It is an amenable number.

74272241 is a deficient number, since it is larger than the sum of its proper divisors (1).

74272241 is an equidigital number, since it uses as much as digits as its factorization.

74272241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 29.

The square root of 74272241 is about 8618.1344268931. The cubic root of 74272241 is about 420.3478618443.

Adding to 74272241 its reverse (14227247), we get a palindrome (88499488).

The spelling of 74272241 in words is "seventy-four million, two hundred seventy-two thousand, two hundred forty-one".