1261616119 has 2 divisors, whose sum is σ = 1261616120. Its totient is φ = 1261616118.

The previous prime is 1261616107. The next prime is 1261616141. The reversal of 1261616119 is 9116161621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1261616119 is a prime.

It is a super-2 number, since 2×1261616119² = 3183350463441244322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1261616179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630808059 + 630808060.

It is an arithmetic number, because the mean of its divisors is an integer number (630808060).

Almost surely, 2^1261616119 is an apocalyptic number.

1261616119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261616119 is an equidigital number, since it uses as much as digits as its factorization.

1261616119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 34.

The square root of 1261616119 is about 35519.2359011283. The cubic root of 1261616119 is about 1080.5438844347.

The spelling of 1261616119 in words is "one billion, two hundred sixty-one million, six hundred sixteen thousand, one hundred nineteen".