1261304522326 has 8 divisors (see below), whose sum is σ = 1891961844624. Its totient is φ = 630650574120.

The previous prime is 1261304522323. The next prime is 1261304522347. The reversal of 1261304522326 is 6232254031621.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261304522321) 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, 554311 + ... + 1682221.

It is an arithmetic number, because the mean of its divisors is an integer number (236495230578).

Almost surely, 2^{1261304522326} is an apocalyptic number.

1261304522326 is a deficient number, since it is larger than the sum of its proper divisors (630657322298).

1261304522326 is a wasteful number, since it uses less digits than its factorization.

1261304522326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687046.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 1261304522326 its reverse (6232254031621), we get a palindrome (7493558553947).

The spelling of 1261304522326 in words is "one trillion, two hundred sixty-one billion, three hundred four million, five hundred twenty-two thousand, three hundred twenty-six".