1268404253 has 4 divisors (see below), whose sum is σ = 1323552288. Its totient is φ = 1213256220.

The previous prime is 1268404231. The next prime is 1268404271. The reversal of 1268404253 is 3524048621.

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 1268404253 - 2¹⁶ = 1268338717 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 (1268424253) 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, 27573983 + ... + 27574028.

It is an arithmetic number, because the mean of its divisors is an integer number (330888072).

Almost surely, 2^1268404253 is an apocalyptic number.

It is an amenable number.

1268404253 is a deficient number, since it is larger than the sum of its proper divisors (55148035).

1268404253 is an equidigital number, since it uses as much as digits as its factorization.

1268404253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55148034.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 1268404253 is about 35614.6634548187. The cubic root of 1268404253 is about 1082.4783769307.

The spelling of 1268404253 in words is "one billion, two hundred sixty-eight million, four hundred four thousand, two hundred fifty-three".