742521343 has 2 divisors, whose sum is σ = 742521344. Its totient is φ = 742521342.

The previous prime is 742521319. The next prime is 742521389. The reversal of 742521343 is 343125247.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742521343 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742521943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371260671 + 371260672.

It is an arithmetic number, because the mean of its divisors is an integer number (371260672).

Almost surely, 2^742521343 is an apocalyptic number.

742521343 is a deficient number, since it is larger than the sum of its proper divisors (1).

742521343 is an equidigital number, since it uses as much as digits as its factorization.

742521343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 31.

The square root of 742521343 is about 27249.2448152238. The cubic root of 742521343 is about 905.5302867767.

The spelling of 742521343 in words is "seven hundred forty-two million, five hundred twenty-one thousand, three hundred forty-three".