731278241 has 2 divisors, whose sum is σ = 731278242. Its totient is φ = 731278240.

The previous prime is 731278199. The next prime is 731278271. The reversal of 731278241 is 142872137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403849216 + 327429025 = 20096^2 + 18095^2 .

It is a cyclic number.

It is not a de Polignac number, because 731278241 - 2¹⁴ = 731261857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (731278271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365639120 + 365639121.

It is an arithmetic number, because the mean of its divisors is an integer number (365639121).

Almost surely, 2^731278241 is an apocalyptic number.

It is an amenable number.

731278241 is a deficient number, since it is larger than the sum of its proper divisors (1).

731278241 is an equidigital number, since it uses as much as digits as its factorization.

731278241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 35.

The square root of 731278241 is about 27042.1567372131. The cubic root of 731278241 is about 900.9365727668.

The spelling of 731278241 in words is "seven hundred thirty-one million, two hundred seventy-eight thousand, two hundred forty-one".