126313346261 has 4 divisors (see below), whose sum is σ = 126314084652. Its totient is φ = 126312607872.

The previous prime is 126313346239. The next prime is 126313346293. The reversal of 126313346261 is 162643313621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 162643313621 = 37 ⋅4395765233.

It can be written as a sum of positive squares in 2 ways, for example, as 107958244900 + 18355101361 = 328570^2 + 135481^2 .

It is a cyclic number.

It is not a de Polignac number, because 126313346261 - 2¹⁰ = 126313345237 is a prime.

It is a super-2 number, since 2×126313346261² (a number of 23 digits) 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 (126313346231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34661 + ... + 503813.

It is an arithmetic number, because the mean of its divisors is an integer number (31578521163).

Almost surely, 2^126313346261 is an apocalyptic number.

It is an amenable number.

126313346261 is a deficient number, since it is larger than the sum of its proper divisors (738391).

126313346261 is an equidigital number, since it uses as much as digits as its factorization.

126313346261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738390.

The product of its digits is 93312, while the sum is 38.

Adding to 126313346261 its reverse (162643313621), we get a palindrome (288956659882).

The spelling of 126313346261 in words is "one hundred twenty-six billion, three hundred thirteen million, three hundred forty-six thousand, two hundred sixty-one".