1272245 has 24 divisors (see below), whose sum is σ = 1765176. Its totient is φ = 874368.

The previous prime is 1272233. The next prime is 1272247. The reversal of 1272245 is 5422721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 152881 + 1119364 = 391^2 + 1058^2 .

It is not a de Polignac number, because 1272245 - 2¹⁴ = 1255861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34367 + ... + 34403.

It is an arithmetic number, because the mean of its divisors is an integer number (73549).

2^1272245 is an apocalyptic number.

It is an amenable number.

1272245 is a deficient number, since it is larger than the sum of its proper divisors (492931).

1272245 is a wasteful number, since it uses less digits than its factorization.

1272245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 78 counting only the distinct ones).

The product of its digits is 1120, while the sum is 23.

The square root of 1272245 is about 1127.9383848420. The cubic root of 1272245 is about 108.3569862883.

Adding to 1272245 its reverse (5422721), we get a palindrome (6694966).

The spelling of 1272245 in words is "one million, two hundred seventy-two thousand, two hundred forty-five".