1257125523 has 16 divisors (see below), whose sum is σ = 1686110496. Its totient is φ = 833126400.

The previous prime is 1257125521. The next prime is 1257125531. The reversal of 1257125523 is 3255217521.

It is not a de Polignac number, because 1257125523 - 2¹ = 1257125521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1257125521) 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 15 ways as a sum of consecutive naturals, for example, 462015 + ... + 464727.

It is an arithmetic number, because the mean of its divisors is an integer number (105381906).

Almost surely, 2^1257125523 is an apocalyptic number.

1257125523 is a deficient number, since it is larger than the sum of its proper divisors (428984973).

1257125523 is a wasteful number, since it uses less digits than its factorization.

1257125523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574.

The product of its digits is 21000, while the sum is 33.

The square root of 1257125523 is about 35455.9659718925. The cubic root of 1257125523 is about 1079.2603311523.

The spelling of 1257125523 in words is "one billion, two hundred fifty-seven million, one hundred twenty-five thousand, five hundred twenty-three".