1268946253 has 4 divisors (see below), whose sum is σ = 1269021820. Its totient is φ = 1268870688.

The previous prime is 1268946241. The next prime is 1268946307. The reversal of 1268946253 is 3526498621.

1268946253 is a nontrivial binomial coefficient, being equal to C(50378, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1103103369 + 165842884 = 33213^2 + 12878^2 .

It is a 3-Lehmer number, since φ(1268946253) divides (1268946253-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1268946253 - 2²⁵ = 1235391821 is a prime.

It is a super-2 number, since 2×1268946253² = 3220449186005480018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268946223) 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, 1 + ... + 50377.

It is an arithmetic number, because the mean of its divisors is an integer number (317255455).

It is a Poulet number, since it divides 2^1268946252-1.

Almost surely, 2^1268946253 is an apocalyptic number.

1268946253 is the 50377-th triangular number and also the 25189-th hexagonal number.

1268946253 is the 16793-rd centered nonagonal number.

It is an amenable number.

1268946253 is a deficient number, since it is larger than the sum of its proper divisors (75567).

1268946253 is an equidigital number, since it uses as much as digits as its factorization.

1268946253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75566.

The product of its digits is 622080, while the sum is 46.

The square root of 1268946253 is about 35622.2718674708. The cubic root of 1268946253 is about 1082.6325390681.

The spelling of 1268946253 in words is "one billion, two hundred sixty-eight million, nine hundred forty-six thousand, two hundred fifty-three".