1240253 has 8 divisors (see below), whose sum is σ = 1444608. Its totient is φ = 1042704.

The previous prime is 1240247. The next prime is 1240271. The reversal of 1240253 is 3520421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240253 - 2¹⁰ = 1239229 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 (1240273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301 + ... + 2042.

It is an arithmetic number, because the mean of its divisors is an integer number (180576).

2^1240253 is an apocalyptic number.

It is an amenable number.

1240253 is a deficient number, since it is larger than the sum of its proper divisors (204355).

1240253 is an equidigital number, since it uses as much as digits as its factorization.

1240253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1240253 is about 1113.6664671256. Note that the first 3 decimals coincide. The cubic root of 1240253 is about 107.4410132493.

Adding to 1240253 its reverse (3520421), we get a palindrome (4760674).

The spelling of 1240253 in words is "one million, two hundred forty thousand, two hundred fifty-three".