1251148147 has 2 divisors, whose sum is σ = 1251148148. Its totient is φ = 1251148146.

The previous prime is 1251148139. The next prime is 1251148187. The reversal of 1251148147 is 7418411521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251148147 - 2³ = 1251148139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251148187) 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 as a sum of consecutive naturals, namely, 625574073 + 625574074.

It is an arithmetic number, because the mean of its divisors is an integer number (625574074).

Almost surely, 2^1251148147 is an apocalyptic number.

1251148147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251148147 is an equidigital number, since it uses as much as digits as its factorization.

1251148147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 34.

The square root of 1251148147 is about 35371.5725830786. The cubic root of 1251148147 is about 1077.5470584508.

Adding to 1251148147 its reverse (7418411521), we get a palindrome (8669559668).

The spelling of 1251148147 in words is "one billion, two hundred fifty-one million, one hundred forty-eight thousand, one hundred forty-seven".