1201611 has 8 divisors (see below), whose sum is σ = 1696464. Its totient is φ = 753920.

The previous prime is 1201601. The next prime is 1201633. The reversal of 1201611 is 1161021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1201611 - 2⁷ = 1201483 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1201601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11730 + ... + 11831.

It is an arithmetic number, because the mean of its divisors is an integer number (212058).

2^1201611 is an apocalyptic number.

1201611 is a deficient number, since it is larger than the sum of its proper divisors (494853).

1201611 is a wasteful number, since it uses less digits than its factorization.

1201611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23581.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1201611 is about 1096.1801859184. The cubic root of 1201611 is about 106.3133896247.

Adding to 1201611 its reverse (1161021), we get a palindrome (2362632).

The spelling of 1201611 in words is "one million, two hundred one thousand, six hundred eleven".