1261152119 has 4 divisors (see below), whose sum is σ = 1284947496. Its totient is φ = 1237356744.

The previous prime is 1261152107. The next prime is 1261152149. The reversal of 1261152119 is 9112511621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1261152119 - 2⁸ = 1261151863 is a prime.

It is a super-2 number, since 2×1261152119² = 3181009334516380322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1261152091 and 1261152100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261152149) 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 3 ways as a sum of consecutive naturals, for example, 11897609 + ... + 11897714.

It is an arithmetic number, because the mean of its divisors is an integer number (321236874).

Almost surely, 2^1261152119 is an apocalyptic number.

1261152119 is a deficient number, since it is larger than the sum of its proper divisors (23795377).

1261152119 is an equidigital number, since it uses as much as digits as its factorization.

1261152119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23795376.

The product of its digits is 1080, while the sum is 29.

The square root of 1261152119 is about 35512.7036284201. The cubic root of 1261152119 is about 1080.4113999088.

The spelling of 1261152119 in words is "one billion, two hundred sixty-one million, one hundred fifty-two thousand, one hundred nineteen".