1113621 has 8 divisors (see below), whose sum is σ = 1490784. Its totient is φ = 739440.

The previous prime is 1113617. The next prime is 1113643. The reversal of 1113621 is 1263111.

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

It is not a de Polignac number, because 1113621 - 2² = 1113617 is a prime.

1113621 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1113621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113221) 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, 366 + ... + 1536.

It is an arithmetic number, because the mean of its divisors is an integer number (186348).

2^1113621 is an apocalyptic number.

It is an amenable number.

1113621 is a deficient number, since it is larger than the sum of its proper divisors (377163).

1113621 is a wasteful number, since it uses less digits than its factorization.

1113621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491.

The product of its digits is 36, while the sum is 15.

The square root of 1113621 is about 1055.2824266517. The cubic root of 1113621 is about 103.6523462997.

Adding to 1113621 its reverse (1263111), we get a palindrome (2376732).

The spelling of 1113621 in words is "one million, one hundred thirteen thousand, six hundred twenty-one".