1257948671 has 8 divisors (see below), whose sum is σ = 1452477600. Its totient is φ = 1067125248.

The previous prime is 1257948577. The next prime is 1257948673. The reversal of 1257948671 is 1768497521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1257948671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257948673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925646 + ... + 927003.

It is an arithmetic number, because the mean of its divisors is an integer number (181559700).

Almost surely, 2^1257948671 is an apocalyptic number.

1257948671 is a deficient number, since it is larger than the sum of its proper divisors (194528929).

1257948671 is an equidigital number, since it uses as much as digits as its factorization.

1257948671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852753.

The product of its digits is 846720, while the sum is 50.

The square root of 1257948671 is about 35467.5721046705. The cubic root of 1257948671 is about 1079.4958412202.

The spelling of 1257948671 in words is "one billion, two hundred fifty-seven million, nine hundred forty-eight thousand, six hundred seventy-one".