1251303126 has 16 divisors (see below), whose sum is σ = 2543633328. Its totient is φ = 410263200.

The previous prime is 1251303113. The next prime is 1251303133. The reversal of 1251303126 is 6213031521.

It is a junction number, because it is equal to n+sod(n) for n = 1251303096 and 1251303105.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1709065 + ... + 1709796.

It is an arithmetic number, because the mean of its divisors is an integer number (158977083).

Almost surely, 2^1251303126 is an apocalyptic number.

1251303126 is an abundant number, since it is smaller than the sum of its proper divisors (1292330202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251303126 is a wasteful number, since it uses less digits than its factorization.

1251303126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418927.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1251303126 is about 35373.7632433983. The cubic root of 1251303126 is about 1077.5915483250.

Adding to 1251303126 its reverse (6213031521), we get a palindrome (7464334647).

The spelling of 1251303126 in words is "one billion, two hundred fifty-one million, three hundred three thousand, one hundred twenty-six".