1264517105 has 4 divisors (see below), whose sum is σ = 1517420532. Its totient is φ = 1011613680.

The previous prime is 1264517101. The next prime is 1264517117. The reversal of 1264517105 is 5017154621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5017154621 = 59 ⋅85036519.

It can be written as a sum of positive squares in 2 ways, for example, as 878944609 + 385572496 = 29647^2 + 19636^2 .

It is not a de Polignac number, because 1264517105 - 2² = 1264517101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264517101) 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, 126451706 + ... + 126451715.

It is an arithmetic number, because the mean of its divisors is an integer number (379355133).

Almost surely, 2^1264517105 is an apocalyptic number.

It is an amenable number.

1264517105 is a deficient number, since it is larger than the sum of its proper divisors (252903427).

1264517105 is an equidigital number, since it uses as much as digits as its factorization.

1264517105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252903426.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1264517105 is about 35560.0492828680. The cubic root of 1264517105 is about 1081.3714587071.

The spelling of 1264517105 in words is "one billion, two hundred sixty-four million, five hundred seventeen thousand, one hundred five".