1871841 has 4 divisors (see below), whose sum is σ = 2495792. Its totient is φ = 1247892.

The previous prime is 1871839. The next prime is 1871843. The reversal of 1871841 is 1481781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1871839) and next prime (1871843).

It is not a de Polignac number, because 1871841 - 2¹ = 1871839 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

1871841 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1871799 and 1871808.

It is not an unprimeable number, because it can be changed into a prime (1871843) 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, 311971 + ... + 311976.

It is an arithmetic number, because the mean of its divisors is an integer number (623948).

2^1871841 is an apocalyptic number.

It is an amenable number.

1871841 is a deficient number, since it is larger than the sum of its proper divisors (623951).

1871841 is an equidigital number, since it uses as much as digits as its factorization.

1871841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623950.

The product of its digits is 1792, while the sum is 30.

The square root of 1871841 is about 1368.1524037913. The cubic root of 1871841 is about 123.2413135535.

The spelling of 1871841 in words is "one million, eight hundred seventy-one thousand, eight hundred forty-one".