1261152655 has 8 divisors (see below), whose sum is σ = 1729580832. Its totient is φ = 864790368.

The previous prime is 1261152637. The next prime is 1261152689. The reversal of 1261152655 is 5562511621.

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 1261152655 - 2²⁹ = 724281743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1261152655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18016432 + ... + 18016501.

It is an arithmetic number, because the mean of its divisors is an integer number (216197604).

Almost surely, 2^1261152655 is an apocalyptic number.

1261152655 is a deficient number, since it is larger than the sum of its proper divisors (468428177).

1261152655 is an equidigital number, since it uses as much as digits as its factorization.

1261152655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36032945.

The product of its digits is 18000, while the sum is 34.

The square root of 1261152655 is about 35512.7111750145. The cubic root of 1261152655 is about 1080.4115529700.

The spelling of 1261152655 in words is "one billion, two hundred sixty-one million, one hundred fifty-two thousand, six hundred fifty-five".