1201226605 has 4 divisors (see below), whose sum is σ = 1441471932. Its totient is φ = 960981280.

The previous prime is 1201226581. The next prime is 1201226617. The reversal of 1201226605 is 5066221021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5066221021 = 827 ⋅6126023.

It can be written as a sum of positive squares in 2 ways, for example, as 328733161 + 872493444 = 18131^2 + 29538^2 .

It is not a de Polignac number, because 1201226605 - 2⁵ = 1201226573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201226605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120122656 + ... + 120122665.

It is an arithmetic number, because the mean of its divisors is an integer number (360367983).

Almost surely, 2^1201226605 is an apocalyptic number.

It is an amenable number.

1201226605 is a deficient number, since it is larger than the sum of its proper divisors (240245327).

1201226605 is an equidigital number, since it uses as much as digits as its factorization.

1201226605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240245326.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1201226605 is about 34658.7161476013. The cubic root of 1201226605 is about 1063.0205187509.

Adding to 1201226605 its reverse (5066221021), we get a palindrome (6267447626).

The spelling of 1201226605 in words is "one billion, two hundred one million, two hundred twenty-six thousand, six hundred five".