740520161 has 2 divisors, whose sum is σ = 740520162. Its totient is φ = 740520160.

The previous prime is 740520101. The next prime is 740520163. The reversal of 740520161 is 161025047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592435600 + 148084561 = 24340^2 + 12169^2 .

It is a cyclic number.

It is not a de Polignac number, because 740520161 - 2⁶ = 740520097 is a prime.

Together with 740520163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 740520161.

It is not a weakly prime, because it can be changed into another prime (740520163) 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, 370260080 + 370260081.

It is an arithmetic number, because the mean of its divisors is an integer number (370260081).

Almost surely, 2^740520161 is an apocalyptic number.

It is an amenable number.

740520161 is a deficient number, since it is larger than the sum of its proper divisors (1).

740520161 is an equidigital number, since it uses as much as digits as its factorization.

740520161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 740520161 is about 27212.5000872761. The cubic root of 740520161 is about 904.7160514519.

The spelling of 740520161 in words is "seven hundred forty million, five hundred twenty thousand, one hundred sixty-one".