1257268126 has 8 divisors (see below), whose sum is σ = 1887584904. Its totient is φ = 628073160.

The previous prime is 1257268087. The next prime is 1257268127. The reversal of 1257268126 is 6218627521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257268127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277645 + ... + 282136.

It is an arithmetic number, because the mean of its divisors is an integer number (235948113).

Almost surely, 2^1257268126 is an apocalyptic number.

1257268126 is a deficient number, since it is larger than the sum of its proper divisors (630316778).

1257268126 is a wasteful number, since it uses less digits than its factorization.

1257268126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560906.

The product of its digits is 80640, while the sum is 40.

The square root of 1257268126 is about 35457.9769022430. The cubic root of 1257268126 is about 1079.3011385178.

The spelling of 1257268126 in words is "one billion, two hundred fifty-seven million, two hundred sixty-eight thousand, one hundred twenty-six".