1251265 has 4 divisors (see below), whose sum is σ = 1501524. Its totient is φ = 1001008.

The previous prime is 1251259. The next prime is 1251287. The reversal of 1251265 is 5621521.

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 194481 + 1056784 = 441^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251265 - 2¹¹ = 1249217 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125122 + ... + 125131.

It is an arithmetic number, because the mean of its divisors is an integer number (375381).

2^1251265 is an apocalyptic number.

It is an amenable number.

1251265 is a deficient number, since it is larger than the sum of its proper divisors (250259).

1251265 is an equidigital number, since it uses as much as digits as its factorization.

1251265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250258.

The product of its digits is 600, while the sum is 22.

The square root of 1251265 is about 1118.5995708921. The cubic root of 1251265 is about 107.7580603822.

Adding to 1251265 its reverse (5621521), we get a palindrome (6872786).

The spelling of 1251265 in words is "one million, two hundred fifty-one thousand, two hundred sixty-five".