1801525 has 12 divisors (see below), whose sum is σ = 2437344. Its totient is φ = 1310000.

The previous prime is 1801517. The next prime is 1801529. The reversal of 1801525 is 5251081.

It is not a de Polignac number, because 1801525 - 2³ = 1801517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1801496 and 1801505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3001 + ... + 3550.

It is an arithmetic number, because the mean of its divisors is an integer number (203112).

2^1801525 is an apocalyptic number.

It is an amenable number.

1801525 is a deficient number, since it is larger than the sum of its proper divisors (635819).

1801525 is a wasteful number, since it uses less digits than its factorization.

1801525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572 (or 6567 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1801525 is about 1342.2090001188. The cubic root of 1801525 is about 121.6783833924.

The spelling of 1801525 in words is "one million, eight hundred one thousand, five hundred twenty-five".