1261010223 has 12 divisors (see below), whose sum is σ = 1987046568. Its totient is φ = 764248560.

The previous prime is 1261010203. The next prime is 1261010293. The reversal of 1261010223 is 3220101621.

It is not a de Polignac number, because 1261010223 - 2⁶ = 1261010159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1261010196 and 1261010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261010203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6368640 + ... + 6368837.

It is an arithmetic number, because the mean of its divisors is an integer number (165587214).

Almost surely, 2^1261010223 is an apocalyptic number.

1261010223 is a deficient number, since it is larger than the sum of its proper divisors (726036345).

1261010223 is a wasteful number, since it uses less digits than its factorization.

1261010223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12737494 (or 12737491 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1261010223 is about 35510.7057519278. The cubic root of 1261010223 is about 1080.3708782821.

Adding to 1261010223 its reverse (3220101621), we get a palindrome (4481111844).

The spelling of 1261010223 in words is "one billion, two hundred sixty-one million, ten thousand, two hundred twenty-three".