245640071 has 2 divisors, whose sum is σ = 245640072. Its totient is φ = 245640070.

The previous prime is 245640053. The next prime is 245640079. The reversal of 245640071 is 170046542.

245640071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245640071 - 2¹⁴ = 245623687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245640079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122820035 + 122820036.

It is an arithmetic number, because the mean of its divisors is an integer number (122820036).

Almost surely, 2^245640071 is an apocalyptic number.

245640071 is a deficient number, since it is larger than the sum of its proper divisors (1).

245640071 is an equidigital number, since it uses as much as digits as its factorization.

245640071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 245640071 is about 15672.9088238272. The cubic root of 245640071 is about 626.2769166509.

The spelling of 245640071 in words is "two hundred forty-five million, six hundred forty thousand, seventy-one".