1272243 has 16 divisors (see below), whose sum is σ = 1981440. Its totient is φ = 710976.

The previous prime is 1272233. The next prime is 1272247. The reversal of 1272243 is 3422721.

It is not a de Polignac number, because 1272243 - 2⁵ = 1272211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 15 ways as a sum of consecutive naturals, for example, 343 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (123840).

2^1272243 is an apocalyptic number.

1272243 is a deficient number, since it is larger than the sum of its proper divisors (709197).

1272243 is a wasteful number, since it uses less digits than its factorization.

1272243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346.

The product of its digits is 672, while the sum is 21.

The square root of 1272243 is about 1127.9374982684. The cubic root of 1272243 is about 108.3569295084.

Adding to 1272243 its reverse (3422721), we get a palindrome (4694964).

The spelling of 1272243 in words is "one million, two hundred seventy-two thousand, two hundred forty-three".