1268191265 has 16 divisors (see below), whose sum is σ = 1663514496. Its totient is φ = 920467200.

The previous prime is 1268191231. The next prime is 1268191277. The reversal of 1268191265 is 5621918621.

It is not a de Polignac number, because 1268191265 - 2⁸ = 1268191009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4745 + ... + 50585.

It is an arithmetic number, because the mean of its divisors is an integer number (103969656).

Almost surely, 2^1268191265 is an apocalyptic number.

It is an amenable number.

1268191265 is a deficient number, since it is larger than the sum of its proper divisors (395323231).

1268191265 is a wasteful number, since it uses less digits than its factorization.

1268191265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46360.

The product of its digits is 51840, while the sum is 41.

The square root of 1268191265 is about 35611.6731564244. The cubic root of 1268191265 is about 1082.4177843107.

The spelling of 1268191265 in words is "one billion, two hundred sixty-eight million, one hundred ninety-one thousand, two hundred sixty-five".