1213106726 has 16 divisors (see below), whose sum is σ = 1963054464. Its totient is φ = 558918144.

The previous prime is 1213106717. The next prime is 1213106747. The reversal of 1213106726 is 6276013121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25430 + ... + 55433.

It is an arithmetic number, because the mean of its divisors is an integer number (122690904).

Almost surely, 2^1213106726 is an apocalyptic number.

1213106726 is a deficient number, since it is larger than the sum of its proper divisors (749947738).

1213106726 is a wasteful number, since it uses less digits than its factorization.

1213106726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81455.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1213106726 is about 34829.6816810031. The cubic root of 1213106726 is about 1066.5134502369.

Adding to 1213106726 its reverse (6276013121), we get a palindrome (7489119847).

The spelling of 1213106726 in words is "one billion, two hundred thirteen million, one hundred six thousand, seven hundred twenty-six".