1252305 has 24 divisors (see below), whose sum is σ = 2299752. Its totient is φ = 628224.

The previous prime is 1252283. The next prime is 1252331. The reversal of 1252305 is 5032521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33489 + 1218816 = 183^2 + 1104^2 .

It is not a de Polignac number, because 1252305 - 2⁷ = 1252177 is a prime.

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

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 54 + ... + 1583.

It is an arithmetic number, because the mean of its divisors is an integer number (95823).

2^1252305 is an apocalyptic number.

1252305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1252305 is a deficient number, since it is larger than the sum of its proper divisors (1047447).

1252305 is a wasteful number, since it uses less digits than its factorization.

1252305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1252305 is about 1119.0643413138. The cubic root of 1252305 is about 107.7879068038.

Adding to 1252305 its reverse (5032521), we get a palindrome (6284826).

The spelling of 1252305 in words is "one million, two hundred fifty-two thousand, three hundred five".