1861343 has 6 divisors (see below), whose sum is σ = 2046072. Its totient is φ = 1692020.

The previous prime is 1861339. The next prime is 1861351. The reversal of 1861343 is 3431681.

It is not a de Polignac number, because 1861343 - 2² = 1861339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861303) 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, 7571 + ... + 7812.

It is an arithmetic number, because the mean of its divisors is an integer number (341012).

2^1861343 is an apocalyptic number.

1861343 is a deficient number, since it is larger than the sum of its proper divisors (184729).

1861343 is a wasteful number, since it uses less digits than its factorization.

1861343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15405 (or 15394 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 1861343 is about 1364.3104485417. The cubic root of 1861343 is about 123.0104866905.

The spelling of 1861343 in words is "one million, eight hundred sixty-one thousand, three hundred forty-three".