1206601556 has 12 divisors (see below), whose sum is σ = 2111870292. Its totient is φ = 603210048.

The previous prime is 1206601549. The next prime is 1206601559. The reversal of 1206601556 is 6551066021.

It can be written as a sum of positive squares in 2 ways, for example, as 735277456 + 471324100 = 27116^2 + 21710^2 .

It is a super-2 number, since 2×1206601556² = 2911774629883242272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206601559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13736 + ... + 51008.

It is an arithmetic number, because the mean of its divisors is an integer number (175989191).

Almost surely, 2^1206601556 is an apocalyptic number.

It is an amenable number.

1206601556 is a deficient number, since it is larger than the sum of its proper divisors (905268736).

1206601556 is a wasteful number, since it uses less digits than its factorization.

1206601556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45370 (or 45368 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1206601556 is about 34736.1707158403. The cubic root of 1206601556 is about 1064.6036733477.

Adding to 1206601556 its reverse (6551066021), we get a palindrome (7757667577).

The spelling of 1206601556 in words is "one billion, two hundred six million, six hundred one thousand, five hundred fifty-six".