1257260168 has 32 divisors (see below), whose sum is σ = 2376380160. Its totient is φ = 623575680.

The previous prime is 1257260161. The next prime is 1257260189. The reversal of 1257260168 is 8610627521.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1257260161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216580 + ... + 1217612.

It is an arithmetic number, because the mean of its divisors is an integer number (74261880).

Almost surely, 2^1257260168 is an apocalyptic number.

It is an amenable number.

1257260168 is a deficient number, since it is larger than the sum of its proper divisors (1119119992).

1257260168 is a wasteful number, since it uses less digits than its factorization.

1257260168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1257260168 is about 35457.8646847212. The cubic root of 1257260168 is about 1079.2988613327.

Adding to 1257260168 its reverse (8610627521), we get a palindrome (9867887689).

The spelling of 1257260168 in words is "one billion, two hundred fifty-seven million, two hundred sixty thousand, one hundred sixty-eight".