742521319 has 2 divisors, whose sum is σ = 742521320. Its totient is φ = 742521318.

The previous prime is 742521289. The next prime is 742521343. The reversal of 742521319 is 913125247.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 742521319 - 2⁵ = 742521287 is a prime.

It is a super-2 number, since 2×742521319² = 1102675818338999522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742521389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371260659 + 371260660.

It is an arithmetic number, because the mean of its divisors is an integer number (371260660).

Almost surely, 2^742521319 is an apocalyptic number.

742521319 is a deficient number, since it is larger than the sum of its proper divisors (1).

742521319 is an equidigital number, since it uses as much as digits as its factorization.

742521319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 742521319 is about 27249.2443748446. The cubic root of 742521319 is about 905.5302770204.

The spelling of 742521319 in words is "seven hundred forty-two million, five hundred twenty-one thousand, three hundred nineteen".