1251145043 has 2 divisors, whose sum is σ = 1251145044. Its totient is φ = 1251145042.

The previous prime is 1251145019. The next prime is 1251145111. The reversal of 1251145043 is 3405411521.

It is a weak prime.

It is an emirp because it is prime and its reverse (3405411521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1251145043 - 2⁸ = 1251144787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251145943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625572521 + 625572522.

It is an arithmetic number, because the mean of its divisors is an integer number (625572522).

Almost surely, 2^1251145043 is an apocalyptic number.

1251145043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251145043 is an equidigital number, since it uses as much as digits as its factorization.

1251145043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1251145043 is about 35371.5287060087. The cubic root of 1251145043 is about 1077.5461673470.

Adding to 1251145043 its reverse (3405411521), we get a palindrome (4656556564).

The spelling of 1251145043 in words is "one billion, two hundred fifty-one million, one hundred forty-five thousand, forty-three".