1261086423 has 8 divisors (see below), whose sum is σ = 1681632768. Its totient is φ = 840632184.

The previous prime is 1261086361. The next prime is 1261086457. The reversal of 1261086423 is 3246801621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1261086423 - 2²¹ = 1258989271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261086493) by changing a digit.

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, 20890 + ... + 54392.

It is an arithmetic number, because the mean of its divisors is an integer number (210204096).

Almost surely, 2^1261086423 is an apocalyptic number.

1261086423 is a deficient number, since it is larger than the sum of its proper divisors (420546345).

1261086423 is a wasteful number, since it uses less digits than its factorization.

1261086423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46053.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 1261086423 is about 35511.7786515967. The cubic root of 1261086423 is about 1080.3926393012.

The spelling of 1261086423 in words is "one billion, two hundred sixty-one million, eighty-six thousand, four hundred twenty-three".