1121625 has 24 divisors (see below), whose sum is σ = 2023944. Its totient is φ = 597600.

The previous prime is 1121621. The next prime is 1121629. The reversal of 1121625 is 5261211.

It is an interprime number because it is at equal distance from previous prime (1121621) and next prime (1121629).

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 1121481 = 12^2 + 1059^2 .

It is not a de Polignac number, because 1121625 - 2² = 1121621 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1121598 and 1121607.

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 23 ways as a sum of consecutive naturals, for example, 627 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (84331).

2^1121625 is an apocalyptic number.

1121625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121625 is a deficient number, since it is larger than the sum of its proper divisors (902319).

1121625 is an equidigital number, since it uses as much as digits as its factorization.

1121625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1005 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1121625 is about 1059.0679864862. The cubic root of 1121625 is about 103.9000827836.

Adding to 1121625 its reverse (5261211), we get a palindrome (6382836).

The spelling of 1121625 in words is "one million, one hundred twenty-one thousand, six hundred twenty-five".