1941661 has 4 divisors (see below), whose sum is σ = 1950592. Its totient is φ = 1932732.

The previous prime is 1941659. The next prime is 1941671. The reversal of 1941661 is 1661491.

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: 1661491 = 13 ⋅127807.

It is a cyclic number.

It is not a de Polignac number, because 1941661 - 2¹ = 1941659 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 (1941601) 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, 4131 + ... + 4576.

It is an arithmetic number, because the mean of its divisors is an integer number (487648).

2^1941661 is an apocalyptic number.

1941661 is the 805-th hex number.

It is an amenable number.

1941661 is a deficient number, since it is larger than the sum of its proper divisors (8931).

1941661 is an equidigital number, since it uses as much as digits as its factorization.

1941661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930.

The product of its digits is 1296, while the sum is 28.

The square root of 1941661 is about 1393.4349643955. The cubic root of 1941661 is about 124.7549546026.

The spelling of 1941661 in words is "one million, nine hundred forty-one thousand, six hundred sixty-one".