1894661 has 4 divisors (see below), whose sum is σ = 1994400. Its totient is φ = 1794924.

The previous prime is 1894643. The next prime is 1894663. The reversal of 1894661 is 1664981.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1664981 = 491 ⋅3391.

It is a cyclic number.

It is not a de Polignac number, because 1894661 - 2¹⁴ = 1878277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894663) 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, 49841 + ... + 49878.

It is an arithmetic number, because the mean of its divisors is an integer number (498600).

2^1894661 is an apocalyptic number.

It is an amenable number.

1894661 is a deficient number, since it is larger than the sum of its proper divisors (99739).

1894661 is an equidigital number, since it uses as much as digits as its factorization.

1894661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99738.

The product of its digits is 10368, while the sum is 35.

The square root of 1894661 is about 1376.4668539416. The cubic root of 1894661 is about 123.7401121236.

The spelling of 1894661 in words is "one million, eight hundred ninety-four thousand, six hundred sixty-one".