1252749 has 4 divisors (see below), whose sum is σ = 1670336. Its totient is φ = 835164.

The previous prime is 1252739. The next prime is 1252751. The reversal of 1252749 is 9472521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1252749 - 2⁵ = 1252717 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252729) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 208789 + ... + 208794.

It is an arithmetic number, because the mean of its divisors is an integer number (417584).

2^1252749 is an apocalyptic number.

It is an amenable number.

1252749 is a deficient number, since it is larger than the sum of its proper divisors (417587).

1252749 is an equidigital number, since it uses as much as digits as its factorization.

1252749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417586.

The product of its digits is 5040, while the sum is 30.

The square root of 1252749 is about 1119.2627037474. The cubic root of 1252749 is about 107.8006438968.

The spelling of 1252749 in words is "one million, two hundred fifty-two thousand, seven hundred forty-nine".