1257103126 has 4 divisors (see below), whose sum is σ = 1885654692. Its totient is φ = 628551562.

The previous prime is 1257103123. The next prime is 1257103139. The reversal of 1257103126 is 6213017521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6213017521 = 5861 ⋅1060061.

It is a junction number, because it is equal to n+sod(n) for n = 1257103094 and 1257103103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257103123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314275780 + ... + 314275783.

It is an arithmetic number, because the mean of its divisors is an integer number (471413673).

Almost surely, 2^1257103126 is an apocalyptic number.

1257103126 is a deficient number, since it is larger than the sum of its proper divisors (628551566).

1257103126 is an equidigital number, since it uses as much as digits as its factorization.

1257103126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628551565.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1257103126 is about 35455.6501280120. The cubic root of 1257103126 is about 1079.2539217321.

The spelling of 1257103126 in words is "one billion, two hundred fifty-seven million, one hundred three thousand, one hundred twenty-six".