745342561 has 2 divisors, whose sum is σ = 745342562. Its totient is φ = 745342560.

The previous prime is 745342399. The next prime is 745342589. The reversal of 745342561 is 165243547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530426961 + 214915600 = 23031^2 + 14660^2 .

It is a cyclic number.

It is not a de Polignac number, because 745342561 - 2¹⁵ = 745309793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 745342561.

It is not a weakly prime, because it can be changed into another prime (746342561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372671280 + 372671281.

It is an arithmetic number, because the mean of its divisors is an integer number (372671281).

Almost surely, 2^745342561 is an apocalyptic number.

It is an amenable number.

745342561 is a deficient number, since it is larger than the sum of its proper divisors (1).

745342561 is an equidigital number, since it uses as much as digits as its factorization.

745342561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 37.

The square root of 745342561 is about 27300.9626387056. The cubic root of 745342561 is about 906.6756947600.

The spelling of 745342561 in words is "seven hundred forty-five million, three hundred forty-two thousand, five hundred sixty-one".