1118621 has 12 divisors (see below), whose sum is σ = 1338588. Its totient is φ = 931392.

The previous prime is 1118599. The next prime is 1118629. The reversal of 1118621 is 1268111.

It can be written as a sum of positive squares in 2 ways, for example, as 470596 + 648025 = 686^2 + 805^2 .

It is not a de Polignac number, because 1118621 - 2¹⁴ = 1102237 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1118593 and 1118602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1505 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (111549).

2^1118621 is an apocalyptic number.

It is an amenable number.

1118621 is a deficient number, since it is larger than the sum of its proper divisors (219967).

1118621 is an equidigital number, since it uses as much as digits as its factorization.

1118621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668 (or 661 counting only the distinct ones).

The product of its digits is 96, while the sum is 20.

The square root of 1118621 is about 1057.6488074971. The cubic root of 1118621 is about 103.8072428100.

The spelling of 1118621 in words is "one million, one hundred eighteen thousand, six hundred twenty-one".