1201136655 has 16 divisors (see below), whose sum is σ = 1929481344. Its totient is φ = 638052000.

The previous prime is 1201136647. The next prime is 1201136687. The reversal of 1201136655 is 5566311021.

It is not a de Polignac number, because 1201136655 - 2³ = 1201136647 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155749 + ... + 163278.

It is an arithmetic number, because the mean of its divisors is an integer number (120592584).

Almost surely, 2^1201136655 is an apocalyptic number.

1201136655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1201136655 is a deficient number, since it is larger than the sum of its proper divisors (728344689).

1201136655 is a wasteful number, since it uses less digits than its factorization.

1201136655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319286.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1201136655 is about 34657.4184699322. The cubic root of 1201136655 is about 1062.9939844617.

Adding to 1201136655 its reverse (5566311021), we get a palindrome (6767447676).

The spelling of 1201136655 in words is "one billion, two hundred one million, one hundred thirty-six thousand, six hundred fifty-five".