630525257 has 16 divisors (see below), whose sum is σ = 683458560. Its totient is φ = 579414528.

The previous prime is 630525229. The next prime is 630525283. The reversal of 630525257 is 752525036.

It is a cyclic number.

It is not a de Polignac number, because 630525257 - 2⁶ = 630525193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630521257) 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 in 15 ways as a sum of consecutive naturals, for example, 492344 + ... + 493622.

It is an arithmetic number, because the mean of its divisors is an integer number (42716160).

Almost surely, 2^630525257 is an apocalyptic number.

It is an amenable number.

630525257 is a deficient number, since it is larger than the sum of its proper divisors (52933303).

630525257 is a wasteful number, since it uses less digits than its factorization.

630525257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 630525257 is about 25110.2619858894. The cubic root of 630525257 is about 857.5000669222.

The spelling of 630525257 in words is "six hundred thirty million, five hundred twenty-five thousand, two hundred fifty-seven".