1861055 has 8 divisors (see below), whose sum is σ = 2552352. Its totient is φ = 1276128.

The previous prime is 1861039. The next prime is 1861061. The reversal of 1861055 is 5501681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1861055 - 2⁴ = 1861039 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26552 + ... + 26621.

It is an arithmetic number, because the mean of its divisors is an integer number (319044).

2^1861055 is an apocalyptic number.

1861055 is a deficient number, since it is larger than the sum of its proper divisors (691297).

1861055 is an equidigital number, since it uses as much as digits as its factorization.

1861055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53185.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1861055 is about 1364.2048966339. The cubic root of 1861055 is about 123.0041420158.

The spelling of 1861055 in words is "one million, eight hundred sixty-one thousand, fifty-five".