1801359 has 28 divisors (see below), whose sum is σ = 3095376. Its totient is φ = 1026432.

The previous prime is 1801357. The next prime is 1801361. The reversal of 1801359 is 9531081.

It is an interprime number because it is at equal distance from previous prime (1801357) and next prime (1801361).

It is not a de Polignac number, because 1801359 - 2¹ = 1801357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801357) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4927 + ... + 5279.

2^1801359 is an apocalyptic number.

1801359 is a deficient number, since it is larger than the sum of its proper divisors (1294017).

1801359 is an frugal number, since it uses more digits than its factorization.

1801359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1801359 is about 1342.1471603367. The cubic root of 1801359 is about 121.6746459603.

The spelling of 1801359 in words is "one million, eight hundred one thousand, three hundred fifty-nine".