1225560253 has 4 divisors (see below), whose sum is σ = 1225637920. Its totient is φ = 1225482588.

The previous prime is 1225560239. The next prime is 1225560257. The reversal of 1225560253 is 3520655221.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3520655221 = 53 ⋅66427457.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225560253 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 (1225560257) 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 3 ways as a sum of consecutive naturals, for example, 5793 + ... + 49846.

It is an arithmetic number, because the mean of its divisors is an integer number (306409480).

Almost surely, 2^1225560253 is an apocalyptic number.

It is an amenable number.

1225560253 is a deficient number, since it is larger than the sum of its proper divisors (77667).

1225560253 is an equidigital number, since it uses as much as digits as its factorization.

1225560253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77666.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 1225560253 is about 35008.0026993829. The cubic root of 1225560253 is about 1070.1505750769.

The spelling of 1225560253 in words is "one billion, two hundred twenty-five million, five hundred sixty thousand, two hundred fifty-three".