742758281 has 2 divisors, whose sum is σ = 742758282. Its totient is φ = 742758280.

The previous prime is 742758259. The next prime is 742758293. The reversal of 742758281 is 182857247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538982656 + 203775625 = 23216^2 + 14275^2 .

It is a cyclic number.

It is not a de Polignac number, because 742758281 - 2¹⁸ = 742496137 is a prime.

It is a super-2 number, since 2×742758281² = 1103379727988149922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (742754281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371379140 + 371379141.

It is an arithmetic number, because the mean of its divisors is an integer number (371379141).

Almost surely, 2^742758281 is an apocalyptic number.

It is an amenable number.

742758281 is a deficient number, since it is larger than the sum of its proper divisors (1).

742758281 is an equidigital number, since it uses as much as digits as its factorization.

742758281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250880, while the sum is 44.

The square root of 742758281 is about 27253.5920751742. The cubic root of 742758281 is about 905.6265945438.

The spelling of 742758281 in words is "seven hundred forty-two million, seven hundred fifty-eight thousand, two hundred eighty-one".