1251148897 has 2 divisors, whose sum is σ = 1251148898. Its totient is φ = 1251148896.

The previous prime is 1251148861. The next prime is 1251148939. The reversal of 1251148897 is 7988411521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 890186896 + 360962001 = 29836^2 + 18999^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251148897 - 2¹¹ = 1251146849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251148817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625574448 + 625574449.

It is an arithmetic number, because the mean of its divisors is an integer number (625574449).

Almost surely, 2^1251148897 is an apocalyptic number.

It is an amenable number.

1251148897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251148897 is an equidigital number, since it uses as much as digits as its factorization.

1251148897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 46.

The square root of 1251148897 is about 35371.5831848109. The cubic root of 1251148897 is about 1077.5472737624.

The spelling of 1251148897 in words is "one billion, two hundred fifty-one million, one hundred forty-eight thousand, eight hundred ninety-seven".