625458257 has 2 divisors, whose sum is σ = 625458258. Its totient is φ = 625458256.

The previous prime is 625458217. The next prime is 625458287. The reversal of 625458257 is 752854526.

625458257 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 can be written as a sum of positive squares in only one way, i.e., 321269776 + 304188481 = 17924^2 + 17441^2 .

It is a cyclic number.

It is not a de Polignac number, because 625458257 - 2¹⁰ = 625457233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625458217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312729128 + 312729129.

It is an arithmetic number, because the mean of its divisors is an integer number (312729129).

Almost surely, 2^625458257 is an apocalyptic number.

It is an amenable number.

625458257 is a deficient number, since it is larger than the sum of its proper divisors (1).

625458257 is an equidigital number, since it uses as much as digits as its factorization.

625458257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672000, while the sum is 44.

The square root of 625458257 is about 25009.1634606198. The cubic root of 625458257 is about 855.1968845406.

The spelling of 625458257 in words is "six hundred twenty-five million, four hundred fifty-eight thousand, two hundred fifty-seven".