1257132254 has 32 divisors (see below), whose sum is σ = 2187953856. Its totient is φ = 530611200.

The previous prime is 1257132211. The next prime is 1257132259. The reversal of 1257132254 is 4522317521.

It is a self number, because there is not a number n which added to its sum of digits gives 1257132254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257132259) 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, 276302 + ... + 280814.

It is an arithmetic number, because the mean of its divisors is an integer number (68373558).

Almost surely, 2^1257132254 is an apocalyptic number.

1257132254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1257132254 is a deficient number, since it is larger than the sum of its proper divisors (930821602).

1257132254 is a wasteful number, since it uses less digits than its factorization.

1257132254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820.

The product of its digits is 16800, while the sum is 32.

The square root of 1257132254 is about 35456.0608923214. The cubic root of 1257132254 is about 1079.2622573690.

Adding to 1257132254 its reverse (4522317521), we get a palindrome (5779449775).

The spelling of 1257132254 in words is "one billion, two hundred fifty-seven million, one hundred thirty-two thousand, two hundred fifty-four".