1257360670 has 16 divisors (see below), whose sum is σ = 2300352768. Its totient is φ = 494699040.

The previous prime is 1257360667. The next prime is 1257360673. The reversal of 1257360670 is 760637521.

It is an interprime number because it is at equal distance from previous prime (1257360667) and next prime (1257360673).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257360673) 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 7 ways as a sum of consecutive naturals, for example, 1030014 + ... + 1031233.

It is an arithmetic number, because the mean of its divisors is an integer number (143772048).

Almost surely, 2^1257360670 is an apocalyptic number.

1257360670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1257360670 is a deficient number, since it is larger than the sum of its proper divisors (1042992098).

1257360670 is a wasteful number, since it uses less digits than its factorization.

1257360670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061315.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 1257360670 is about 35459.2818596203. The cubic root of 1257360670 is about 1079.3276193169.

The spelling of 1257360670 in words is "one billion, two hundred fifty-seven million, three hundred sixty thousand, six hundred seventy".