1275745 has 4 divisors (see below), whose sum is σ = 1530900. Its totient is φ = 1020592.

The previous prime is 1275737. The next prime is 1275749. The reversal of 1275745 is 5475721.

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 767376 + 508369 = 876^2 + 713^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275745 - 2³ = 1275737 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1275749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127570 + ... + 127579.

It is an arithmetic number, because the mean of its divisors is an integer number (382725).

2^1275745 is an apocalyptic number.

It is an amenable number.

1275745 is a deficient number, since it is larger than the sum of its proper divisors (255155).

1275745 is an equidigital number, since it uses as much as digits as its factorization.

1275745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255154.

The product of its digits is 9800, while the sum is 31.

The square root of 1275745 is about 1129.4888224325. The cubic root of 1275745 is about 108.4562601980.

It can be divided in two parts, 12 and 75745, that added together give a palindrome (75757).

The spelling of 1275745 in words is "one million, two hundred seventy-five thousand, seven hundred forty-five".