1155825 has 36 divisors (see below), whose sum is σ = 2263248. Its totient is φ = 559200.

The previous prime is 1155823. The next prime is 1155829. The reversal of 1155825 is 5285511.

1155825 = T₂₇₉ + T₂₈₀ + ... + T₃₀₅.

It is not a de Polignac number, because 1155825 - 2¹ = 1155823 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1155821) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2242 + ... + 2708.

It is an arithmetic number, because the mean of its divisors is an integer number (62868).

2^1155825 is an apocalyptic number.

1155825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155825 is a deficient number, since it is larger than the sum of its proper divisors (1107423).

1155825 is a wasteful number, since it uses less digits than its factorization.

1155825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 486 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1155825 is about 1075.0930192314. The cubic root of 1155825 is about 104.9455500000.

The spelling of 1155825 in words is "one million, one hundred fifty-five thousand, eight hundred twenty-five".