1253243 has 4 divisors (see below), whose sum is σ = 1258488. Its totient is φ = 1248000.

The previous prime is 1253171. The next prime is 1253249. The reversal of 1253243 is 3423521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3423521 = 863 ⋅3967.

It is a cyclic number.

It is not a de Polignac number, because 1253243 - 2⁸ = 1252987 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253249) 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, 2246 + ... + 2747.

It is an arithmetic number, because the mean of its divisors is an integer number (314622).

2^1253243 is an apocalyptic number.

1253243 is a deficient number, since it is larger than the sum of its proper divisors (5245).

1253243 is an equidigital number, since it uses as much as digits as its factorization.

1253243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244.

The product of its digits is 720, while the sum is 20.

The square root of 1253243 is about 1119.4833629849. The cubic root of 1253243 is about 107.8148118107.

Adding to 1253243 its reverse (3423521), we get a palindrome (4676764).

The spelling of 1253243 in words is "one million, two hundred fifty-three thousand, two hundred forty-three".