1121601 has 8 divisors (see below), whose sum is σ = 1610560. Its totient is φ = 690192.

The previous prime is 1121599. The next prime is 1121621. The reversal of 1121601 is 1061211.

It is a happy number.

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

It is not a de Polignac number, because 1121601 - 2¹ = 1121599 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14341 + ... + 14418.

It is an arithmetic number, because the mean of its divisors is an integer number (201320).

2^1121601 is an apocalyptic number.

It is an amenable number.

1121601 is a deficient number, since it is larger than the sum of its proper divisors (488959).

1121601 is a wasteful number, since it uses less digits than its factorization.

1121601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28775.

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

The square root of 1121601 is about 1059.0566557083. The cubic root of 1121601 is about 103.8993417100.

Adding to 1121601 its reverse (1061211), we get a palindrome (2182812).

It can be divided in two parts, 11 and 21601, that added together give a palindrome (21612).

The spelling of 1121601 in words is "one million, one hundred twenty-one thousand, six hundred one".