1825540 has 24 divisors (see below), whose sum is σ = 3877272. Its totient is φ = 721920.

The previous prime is 1825531. The next prime is 1825553. The reversal of 1825540 is 455281.

It can be written as a sum of positive squares in 4 ways, for example, as 222784 + 1602756 = 472^2 + 1266^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1470 + ... + 2410.

It is an arithmetic number, because the mean of its divisors is an integer number (161553).

2^1825540 is an apocalyptic number.

1825540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1825540 is an abundant number, since it is smaller than the sum of its proper divisors (2051732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1825540 is a wasteful number, since it uses less digits than its factorization.

1825540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1825540 is about 1351.1254567952. The cubic root of 1825540 is about 122.2166713120.

The spelling of 1825540 in words is "one million, eight hundred twenty-five thousand, five hundred forty".