1275245 has 4 divisors (see below), whose sum is σ = 1530300. Its totient is φ = 1020192.

The previous prime is 1275227. The next prime is 1275269. The reversal of 1275245 is 5425721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 644809 + 630436 = 803^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275245 - 2⁸ = 1274989 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 127520 + ... + 127529.

It is an arithmetic number, because the mean of its divisors is an integer number (382575).

2^1275245 is an apocalyptic number.

It is an amenable number.

1275245 is a deficient number, since it is larger than the sum of its proper divisors (255055).

1275245 is an equidigital number, since it uses as much as digits as its factorization.

1275245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255054.

The product of its digits is 2800, while the sum is 26.

The square root of 1275245 is about 1129.2674616759. The cubic root of 1275245 is about 108.4420893367.

It can be divided in two parts, 12 and 75245, that added together give a palindrome (75257).

The spelling of 1275245 in words is "one million, two hundred seventy-five thousand, two hundred forty-five".