1251782068 has 12 divisors (see below), whose sum is σ = 2190939940. Its totient is φ = 625799232.

The previous prime is 1251782033. The next prime is 1251782069. The reversal of 1251782068 is 8602871521.

It can be written as a sum of positive squares in 2 ways, for example, as 733218084 + 518563984 = 27078^2 + 22772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1251782068.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251782069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14530 + ... + 52102.

Almost surely, 2^1251782068 is an apocalyptic number.

It is an amenable number.

1251782068 is a deficient number, since it is larger than the sum of its proper divisors (939157872).

1251782068 is a wasteful number, since it uses less digits than its factorization.

1251782068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45906 (or 45904 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 1251782068 is about 35380.5323306476. The cubic root of 1251782068 is about 1077.7290151539.

The spelling of 1251782068 in words is "one billion, two hundred fifty-one million, seven hundred eighty-two thousand, sixty-eight".