742013561 has 2 divisors, whose sum is σ = 742013562. Its totient is φ = 742013560.

The previous prime is 742013539. The next prime is 742013579. The reversal of 742013561 is 165310247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721943161 + 20070400 = 26869^2 + 4480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742013561 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (742013761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371006780 + 371006781.

It is an arithmetic number, because the mean of its divisors is an integer number (371006781).

Almost surely, 2^742013561 is an apocalyptic number.

It is an amenable number.

742013561 is a deficient number, since it is larger than the sum of its proper divisors (1).

742013561 is an equidigital number, since it uses as much as digits as its factorization.

742013561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 742013561 is about 27239.9258626010. The cubic root of 742013561 is about 905.3238205069.

The spelling of 742013561 in words is "seven hundred forty-two million, thirteen thousand, five hundred sixty-one".