1251103412 has 48 divisors (see below), whose sum is σ = 2522755200. Its totient is φ = 538047360.

The previous prime is 1251103411. The next prime is 1251103433. The reversal of 1251103412 is 2143011521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251103411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49889 + ... + 70647.

It is an arithmetic number, because the mean of its divisors is an integer number (52557400).

Almost surely, 2^1251103412 is an apocalyptic number.

It is an amenable number.

1251103412 is an abundant number, since it is smaller than the sum of its proper divisors (1271651788).

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

1251103412 is a wasteful number, since it uses less digits than its factorization.

1251103412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20856 (or 20854 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1251103412 is about 35370.9402193382. The cubic root of 1251103412 is about 1077.5342156759.

Adding to 1251103412 its reverse (2143011521), we get a palindrome (3394114933).

The spelling of 1251103412 in words is "one billion, two hundred fifty-one million, one hundred three thousand, four hundred twelve".