742065387257 has 2 divisors, whose sum is σ = 742065387258. Its totient is φ = 742065387256.

The previous prime is 742065387187. The next prime is 742065387277. The reversal of 742065387257 is 752783560247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428895319801 + 313170067456 = 654901^2 + 559616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742065387257 is a prime.

It is a super-2 number, since 2×742065387257² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (742065387277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371032693628 + 371032693629.

It is an arithmetic number, because the mean of its divisors is an integer number (371032693629).

Almost surely, 2^742065387257 is an apocalyptic number.

It is an amenable number.

742065387257 is a deficient number, since it is larger than the sum of its proper divisors (1).

742065387257 is an equidigital number, since it uses as much as digits as its factorization.

742065387257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19756800, while the sum is 56.

The spelling of 742065387257 in words is "seven hundred forty-two billion, sixty-five million, three hundred eighty-seven thousand, two hundred fifty-seven".