1800153 has 6 divisors (see below), whose sum is σ = 2600234. Its totient is φ = 1200096.

The previous prime is 1800137. The next prime is 1800157. The reversal of 1800153 is 3510081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1172889 + 627264 = 1083^2 + 792^2 .

It is not a de Polignac number, because 1800153 - 2⁴ = 1800137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100000 + ... + 100017.

2^1800153 is an apocalyptic number.

It is an amenable number.

1800153 is a deficient number, since it is larger than the sum of its proper divisors (800081).

1800153 is a wasteful number, since it uses less digits than its factorization.

1800153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200023 (or 200020 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1800153 is about 1341.6978050217. The cubic root of 1800153 is about 121.6474863950.

It can be divided in two parts, 180015 and 3, that multiplied together give a palindrome (540045).

The spelling of 1800153 in words is "one million, eight hundred thousand, one hundred fifty-three".