1801249841 has 4 divisors (see below), whose sum is σ = 1907205732. Its totient is φ = 1695293952.

The previous prime is 1801249811. The next prime is 1801249859. The reversal of 1801249841 is 1489421081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1338096400 + 463153441 = 36580^2 + 21521^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801249841 - 2¹⁴ = 1801233457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1801249795 and 1801249804.

It is not an unprimeable number, because it can be changed into a prime (1801249811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52977920 + ... + 52977953.

It is an arithmetic number, because the mean of its divisors is an integer number (476801433).

Almost surely, 2^1801249841 is an apocalyptic number.

It is an amenable number.

1801249841 is a deficient number, since it is larger than the sum of its proper divisors (105955891).

1801249841 is a wasteful number, since it uses less digits than its factorization.

1801249841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105955890.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1801249841 is about 42441.1338326393. The cubic root of 1801249841 is about 1216.7218815833.

The spelling of 1801249841 in words is "one billion, eight hundred one million, two hundred forty-nine thousand, eight hundred forty-one".