1231253 has 4 divisors (see below), whose sum is σ = 1273740. Its totient is φ = 1188768.

The previous prime is 1231247. The next prime is 1231261. The reversal of 1231253 is 3521321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3521321 = 31 ⋅113591.

It can be written as a sum of positive squares in 2 ways, for example, as 925444 + 305809 = 962^2 + 553^2 .

It is not a de Polignac number, because 1231253 - 2⁸ = 1230997 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 (1231283) 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, 21200 + ... + 21257.

It is an arithmetic number, because the mean of its divisors is an integer number (318435).

2^1231253 is an apocalyptic number.

It is an amenable number.

1231253 is a deficient number, since it is larger than the sum of its proper divisors (42487).

1231253 is an equidigital number, since it uses as much as digits as its factorization.

1231253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42486.

The product of its digits is 180, while the sum is 17.

The square root of 1231253 is about 1109.6184028755. The cubic root of 1231253 is about 107.1804971668.

Adding to 1231253 its reverse (3521321), we get a palindrome (4752574).

The spelling of 1231253 in words is "one million, two hundred thirty-one thousand, two hundred fifty-three".