1861941 has 4 divisors (see below), whose sum is σ = 2482592. Its totient is φ = 1241292.

The previous prime is 1861927. The next prime is 1861961. The reversal of 1861941 is 1491681.

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 not a de Polignac number, because 1861941 - 2¹³ = 1853749 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1861899 and 1861908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310321 + ... + 310326.

It is an arithmetic number, because the mean of its divisors is an integer number (620648).

2^1861941 is an apocalyptic number.

It is an amenable number.

1861941 is a deficient number, since it is larger than the sum of its proper divisors (620651).

1861941 is an equidigital number, since it uses as much as digits as its factorization.

1861941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620650.

The product of its digits is 1728, while the sum is 30.

The square root of 1861941 is about 1364.5295892724. The cubic root of 1861941 is about 123.0236586125.

The spelling of 1861941 in words is "one million, eight hundred sixty-one thousand, nine hundred forty-one".