1226726405 has 8 divisors (see below), whose sum is σ = 1474476792. Its totient is φ = 979777728.

The previous prime is 1226726381. The next prime is 1226726411. The reversal of 1226726405 is 5046276221.

It can be written as a sum of positive squares in 4 ways, for example, as 163379524 + 1063346881 = 12782^2 + 32609^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1226726405 - 2²⁶ = 1159617541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197054 + ... + 203183.

It is an arithmetic number, because the mean of its divisors is an integer number (184309599).

Almost surely, 2^1226726405 is an apocalyptic number.

It is an amenable number.

1226726405 is a deficient number, since it is larger than the sum of its proper divisors (247750387).

1226726405 is an equidigital number, since it uses as much as digits as its factorization.

1226726405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400855.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1226726405 is about 35024.6542452599. The cubic root of 1226726405 is about 1070.4898927123.

The spelling of 1226726405 in words is "one billion, two hundred twenty-six million, seven hundred twenty-six thousand, four hundred five".