725245513 has 2 divisors, whose sum is σ = 725245514. Its totient is φ = 725245512.

The previous prime is 725245471. The next prime is 725245537. The reversal of 725245513 is 315542527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 436517449 + 288728064 = 20893^2 + 16992^2 .

It is an emirp because it is prime and its reverse (315542527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725245513 - 2¹³ = 725237321 is a prime.

It is not a weakly prime, because it can be changed into another prime (725245013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362622756 + 362622757.

It is an arithmetic number, because the mean of its divisors is an integer number (362622757).

Almost surely, 2^725245513 is an apocalyptic number.

It is an amenable number.

725245513 is a deficient number, since it is larger than the sum of its proper divisors (1).

725245513 is an equidigital number, since it uses as much as digits as its factorization.

725245513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 34.

The square root of 725245513 is about 26930.3827117254. The cubic root of 725245513 is about 898.4522835625.

The spelling of 725245513 in words is "seven hundred twenty-five million, two hundred forty-five thousand, five hundred thirteen".