1121705 has 8 divisors (see below), whose sum is σ = 1449672. Its totient is φ = 828288.

The previous prime is 1121699. The next prime is 1121707. The reversal of 1121705 is 5071211.

It can be written as a sum of positive squares in 4 ways, for example, as 33856 + 1087849 = 184^2 + 1043^2 .

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 1121705 - 2⁴ = 1121689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121707) 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, 8564 + ... + 8693.

It is an arithmetic number, because the mean of its divisors is an integer number (181209).

2^1121705 is an apocalyptic number.

It is an amenable number.

1121705 is a deficient number, since it is larger than the sum of its proper divisors (327967).

1121705 is a wasteful number, since it uses less digits than its factorization.

1121705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17275.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1121705 is about 1059.1057548706. The cubic root of 1121705 is about 103.9025529523.

Adding to 1121705 its reverse (5071211), we get a palindrome (6192916).

The spelling of 1121705 in words is "one million, one hundred twenty-one thousand, seven hundred five".