1261514563 has 8 divisors (see below), whose sum is σ = 1336182480. Its totient is φ = 1186897920.

The previous prime is 1261514549. The next prime is 1261514599. The reversal of 1261514563 is 3654151621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1261514563 - 2²⁵ = 1227960131 is a prime.

It is a super-2 number, since 2×1261514563² = 3182837985322161938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261512563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45448 + ... + 67738.

It is an arithmetic number, because the mean of its divisors is an integer number (167022810).

Almost surely, 2^1261514563 is an apocalyptic number.

1261514563 is a deficient number, since it is larger than the sum of its proper divisors (74667917).

1261514563 is a wasteful number, since it uses less digits than its factorization.

1261514563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25637.

The product of its digits is 21600, while the sum is 34.

The square root of 1261514563 is about 35517.8062807939. The cubic root of 1261514563 is about 1080.5148902323.

The spelling of 1261514563 in words is "one billion, two hundred sixty-one million, five hundred fourteen thousand, five hundred sixty-three".