1801552 has 20 divisors (see below), whose sum is σ = 3525940. Its totient is φ = 891648.

The previous prime is 1801549. The next prime is 1801577. The reversal of 1801552 is 2551081.

It can be written as a sum of positive squares in 2 ways, for example, as 1547536 + 254016 = 1244^2 + 504^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228 + ... + 2260.

It is an arithmetic number, because the mean of its divisors is an integer number (176297).

2^1801552 is an apocalyptic number.

It is an amenable number.

1801552 is a deficient number, since it is larger than the sum of its proper divisors (1724388).

1801552 is a wasteful number, since it uses less digits than its factorization.

1801552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1144 counting only the distinct ones).

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

The square root of 1801552 is about 1342.2190581272. The cubic root of 1801552 is about 121.6789912663.

The spelling of 1801552 in words is "one million, eight hundred one thousand, five hundred fifty-two".