1261055623 has 8 divisors (see below), whose sum is σ = 1282507200. Its totient is φ = 1239629280.

The previous prime is 1261055617. The next prime is 1261055629. The reversal of 1261055623 is 3265501621.

It is an interprime number because it is at equal distance from previous prime (1261055617) and next prime (1261055629).

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 1261055623 - 2¹⁷ = 1260924551 is a prime.

It is a super-2 number, since 2×1261055623² = 3180522568599836258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261055629) 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, 113586 + ... + 124192.

It is an arithmetic number, because the mean of its divisors is an integer number (160313400).

Almost surely, 2^1261055623 is an apocalyptic number.

1261055623 is a deficient number, since it is larger than the sum of its proper divisors (21451577).

1261055623 is a wasteful number, since it uses less digits than its factorization.

1261055623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12617.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1261055623 is about 35511.3449900169. The cubic root of 1261055623 is about 1080.3838436143.

The spelling of 1261055623 in words is "one billion, two hundred sixty-one million, fifty-five thousand, six hundred twenty-three".