1211601606 has 8 divisors (see below), whose sum is σ = 2423203224. Its totient is φ = 403867200.

The previous prime is 1211601569. The next prime is 1211601607. The reversal of 1211601606 is 6061061121.

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

1211601606 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211601607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100966795 + ... + 100966806.

It is an arithmetic number, because the mean of its divisors is an integer number (302900403).

Almost surely, 2^1211601606 is an apocalyptic number.

1211601606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211601606 is a wasteful number, since it uses less digits than its factorization.

1211601606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201933606.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1211601606 is about 34808.0681164583. The cubic root of 1211601606 is about 1066.0721878632.

Adding to 1211601606 its reverse (6061061121), we get a palindrome (7272662727).

The spelling of 1211601606 in words is "one billion, two hundred eleven million, six hundred one thousand, six hundred six".