1252851 has 4 divisors (see below), whose sum is σ = 1670472. Its totient is φ = 835232.

The previous prime is 1252843. The next prime is 1252873. The reversal of 1252851 is 1582521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1582521 = 3 ⋅527507.

It is a cyclic number.

It is not a de Polignac number, because 1252851 - 2³ = 1252843 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1252151) 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 3 ways as a sum of consecutive naturals, for example, 208806 + ... + 208811.

It is an arithmetic number, because the mean of its divisors is an integer number (417618).

2^1252851 is an apocalyptic number.

1252851 is a deficient number, since it is larger than the sum of its proper divisors (417621).

1252851 is an equidigital number, since it uses as much as digits as its factorization.

1252851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417620.

The product of its digits is 800, while the sum is 24.

The square root of 1252851 is about 1119.3082685302. The cubic root of 1252851 is about 107.8035695606.

The spelling of 1252851 in words is "one million, two hundred fifty-two thousand, eight hundred fifty-one".