1271245 has 4 divisors (see below), whose sum is σ = 1525500. Its totient is φ = 1016992.

The previous prime is 1271239. The next prime is 1271251. The reversal of 1271245 is 5421721.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1271239) and next prime (1271251).

It can be written as a sum of positive squares in 2 ways, for example, as 243049 + 1028196 = 493^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271245 - 2⁵ = 1271213 is a prime.

1271245 is a lucky number.

It is a congruent 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, 127120 + ... + 127129.

It is an arithmetic number, because the mean of its divisors is an integer number (381375).

2^1271245 is an apocalyptic number.

It is an amenable number.

1271245 is a deficient number, since it is larger than the sum of its proper divisors (254255).

1271245 is an equidigital number, since it uses as much as digits as its factorization.

1271245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254254.

The product of its digits is 560, while the sum is 22.

The square root of 1271245 is about 1127.4950110754. The cubic root of 1271245 is about 108.3285888783.

Adding to 1271245 its reverse (5421721), we get a palindrome (6692966).

The spelling of 1271245 in words is "one million, two hundred seventy-one thousand, two hundred forty-five".