1251541012 has 6 divisors (see below), whose sum is σ = 2190196778. Its totient is φ = 625770504.

The previous prime is 1251541009. The next prime is 1251541019. The reversal of 1251541012 is 2101451521.

It can be written as a sum of positive squares in only one way, i.e., 1230325776 + 21215236 = 35076^2 + 4606^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251541019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156442623 + ... + 156442630.

Almost surely, 2^1251541012 is an apocalyptic number.

It is an amenable number.

1251541012 is a deficient number, since it is larger than the sum of its proper divisors (938655766).

1251541012 is a wasteful number, since it uses less digits than its factorization.

1251541012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312885257 (or 312885255 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1251541012 is about 35377.1255474494. The cubic root of 1251541012 is about 1077.6598311934.

Adding to 1251541012 its reverse (2101451521), we get a palindrome (3352992533).

The spelling of 1251541012 in words is "one billion, two hundred fifty-one million, five hundred forty-one thousand, twelve".