1894861 has 8 divisors (see below), whose sum is σ = 1947384. Its totient is φ = 1843200.

The previous prime is 1894859. The next prime is 1894873. The reversal of 1894861 is 1684981.

1894861 = T₁₄₁ + T₁₄₂ + ... + T₂₄₁.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1425636 + 469225 = 1194^2 + 685^2 .

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

It is a 7-Lehmer number, since φ(1894861) divides (1894861-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 1894861 - 2¹ = 1894859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1894861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7245 + ... + 7501.

It is an arithmetic number, because the mean of its divisors is an integer number (243423).

2^1894861 is an apocalyptic number.

It is an amenable number.

1894861 is a deficient number, since it is larger than the sum of its proper divisors (52523).

1894861 is a wasteful number, since it uses less digits than its factorization.

1894861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431.

The product of its digits is 13824, while the sum is 37.

The square root of 1894861 is about 1376.5395017943. The cubic root of 1894861 is about 123.7444659635.

It can be divided in two parts, 189 and 4861, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 1894861 in words is "one million, eight hundred ninety-four thousand, eight hundred sixty-one".