1251043 has 2 divisors, whose sum is σ = 1251044. Its totient is φ = 1251042.

The previous prime is 1251037. The next prime is 1251053. The reversal of 1251043 is 3401521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251043 - 2⁵ = 1251011 is a prime.

It is the 1119-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (1251053) by changing a digit.

It is a nontrivial repunit in base 1118.

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, 625521 + 625522.

It is an arithmetic number, because the mean of its divisors is an integer number (625522).

2^1251043 is an apocalyptic number.

1251043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251043 is an equidigital number, since it uses as much as digits as its factorization.

1251043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1251043 is about 1118.5003352704. The cubic root of 1251043 is about 107.7516871774.

Adding to 1251043 its reverse (3401521), we get a palindrome (4652564).

The spelling of 1251043 in words is "one million, two hundred fifty-one thousand, forty-three".