1181825 has 12 divisors (see below), whose sum is σ = 1502508. Its totient is φ = 921600.

The previous prime is 1181777. The next prime is 1181839. The reversal of 1181825 is 5281811.

It can be written as a sum of positive squares in 6 ways, for example, as 83521 + 1098304 = 289^2 + 1048^2 .

It is not a de Polignac number, because 1181825 - 2¹⁶ = 1116289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1181794 and 1181803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 449 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (125209).

2^1181825 is an apocalyptic number.

It is an amenable number.

1181825 is a deficient number, since it is larger than the sum of its proper divisors (320683).

1181825 is a wasteful number, since it uses less digits than its factorization.

1181825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1199 counting only the distinct ones).

The product of its digits is 640, while the sum is 26.

The square root of 1181825 is about 1087.1177489122. The cubic root of 1181825 is about 105.7266303543.

The spelling of 1181825 in words is "one million, one hundred eighty-one thousand, eight hundred twenty-five".