1121745 has 32 divisors (see below), whose sum is σ = 1959552. Its totient is φ = 545792.

The previous prime is 1121737. The next prime is 1121819. The reversal of 1121745 is 5471211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1121745 - 2³ = 1121737 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13474 + ... + 13556.

It is an arithmetic number, because the mean of its divisors is an integer number (61236).

2^1121745 is an apocalyptic number.

1121745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121745 is a deficient number, since it is larger than the sum of its proper divisors (837807).

1121745 is a wasteful number, since it uses less digits than its factorization.

1121745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

The product of its digits is 280, while the sum is 21.

The square root of 1121745 is about 1059.1246385577. The cubic root of 1121745 is about 103.9037879926.

Adding to 1121745 its reverse (5471211), we get a palindrome (6592956).

The spelling of 1121745 in words is "one million, one hundred twenty-one thousand, seven hundred forty-five".