1257968293 has 8 divisors (see below), whose sum is σ = 1303948800. Its totient is φ = 1212161328.

The previous prime is 1257968287. The next prime is 1257968297. The reversal of 1257968293 is 3928697521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1257968293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1257968293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257968297) 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, 28533 + ... + 57706.

It is an arithmetic number, because the mean of its divisors is an integer number (162993600).

Almost surely, 2^1257968293 is an apocalyptic number.

It is an amenable number.

1257968293 is a deficient number, since it is larger than the sum of its proper divisors (45980507).

1257968293 is an equidigital number, since it uses as much as digits as its factorization.

1257968293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86771.

The product of its digits is 1632960, while the sum is 52.

The square root of 1257968293 is about 35467.8487224698. The cubic root of 1257968293 is about 1079.5014539975.

The spelling of 1257968293 in words is "one billion, two hundred fifty-seven million, nine hundred sixty-eight thousand, two hundred ninety-three".