1252791 has 6 divisors (see below), whose sum is σ = 1809600. Its totient is φ = 835188.

The previous prime is 1252777. The next prime is 1252799. The reversal of 1252791 is 1972521.

It is not a de Polignac number, because 1252791 - 2⁷ = 1252663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252799) 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 in 5 ways as a sum of consecutive naturals, for example, 69591 + ... + 69608.

It is an arithmetic number, because the mean of its divisors is an integer number (301600).

2^1252791 is an apocalyptic number.

1252791 is a deficient number, since it is larger than the sum of its proper divisors (556809).

1252791 is a wasteful number, since it uses less digits than its factorization.

1252791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139205 (or 139202 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1252791 is about 1119.2814659414. The cubic root of 1252791 is about 107.8018486012.

It can be divided in two parts, 125 and 2791, that added together give a square (2916 = 54²).

The spelling of 1252791 in words is "one million, two hundred fifty-two thousand, seven hundred ninety-one".