1261616059 has 12 divisors (see below), whose sum is σ = 1388091208. Its totient is φ = 1145802240.

The previous prime is 1261616051. The next prime is 1261616063. The reversal of 1261616059 is 9506161621.

It is not a de Polignac number, because 1261616059 - 2³ = 1261616051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261616051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134992 + ... + 144034.

Almost surely, 2^1261616059 is an apocalyptic number.

1261616059 is a deficient number, since it is larger than the sum of its proper divisors (126475149).

1261616059 is a wasteful number, since it uses less digits than its factorization.

1261616059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10218 (or 10207 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1261616059 is about 35519.2350565155. The cubic root of 1261616059 is about 1080.5438673052.

The spelling of 1261616059 in words is "one billion, two hundred sixty-one million, six hundred sixteen thousand, fifty-nine".