1243253 has 4 divisors (see below), whose sum is σ = 1356288. Its totient is φ = 1130220.

The previous prime is 1243211. The next prime is 1243271. The reversal of 1243253 is 3523421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1243253 - 2¹⁶ = 1177717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243273) 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, 56501 + ... + 56522.

It is an arithmetic number, because the mean of its divisors is an integer number (339072).

2^1243253 is an apocalyptic number.

It is an amenable number.

1243253 is a deficient number, since it is larger than the sum of its proper divisors (113035).

1243253 is a wasteful number, since it uses less digits than its factorization.

1243253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113034.

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

The square root of 1243253 is about 1115.0125559831. The cubic root of 1243253 is about 107.5275717992.

Adding to 1243253 its reverse (3523421), we get a palindrome (4766674).

The spelling of 1243253 in words is "one million, two hundred forty-three thousand, two hundred fifty-three".