1227261605 has 16 divisors (see below), whose sum is σ = 1489363200. Its totient is φ = 970737600.

The previous prime is 1227261593. The next prime is 1227261617. The reversal of 1227261605 is 5061627221.

It is an interprime number because it is at equal distance from previous prime (1227261593) and next prime (1227261617).

It is not a de Polignac number, because 1227261605 - 2⁴ = 1227261589 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 523526 + ... + 525864.

It is an arithmetic number, because the mean of its divisors is an integer number (93085200).

Almost surely, 2^1227261605 is an apocalyptic number.

It is an amenable number.

1227261605 is a deficient number, since it is larger than the sum of its proper divisors (262101595).

1227261605 is a wasteful number, since it uses less digits than its factorization.

1227261605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1227261605 is about 35032.2937444867. The cubic root of 1227261605 is about 1070.6455489611.

Adding to 1227261605 its reverse (5061627221), we get a palindrome (6288888826).

The spelling of 1227261605 in words is "one billion, two hundred twenty-seven million, two hundred sixty-one thousand, six hundred five".