1257207112 has 24 divisors (see below), whose sum is σ = 2742123510. Its totient is φ = 538802880.

The previous prime is 1257207097. The next prime is 1257207113. The reversal of 1257207112 is 2117027521.

It can be written as a sum of positive squares in only one way, i.e., 856967076 + 400240036 = 29274^2 + 20006^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1257207113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1603189 + ... + 1603972.

Almost surely, 2^1257207112 is an apocalyptic number.

It is an amenable number.

1257207112 is an abundant number, since it is smaller than the sum of its proper divisors (1484916398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257207112 is a wasteful number, since it uses less digits than its factorization.

1257207112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207181 (or 3207170 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 1257207112 is about 35457.1165212289. The cubic root of 1257207112 is about 1079.2836790903.

The spelling of 1257207112 in words is "one billion, two hundred fifty-seven million, two hundred seven thousand, one hundred twelve".