1862661 has 4 divisors (see below), whose sum is σ = 2483552. Its totient is φ = 1241772.

The previous prime is 1862659. The next prime is 1862669. The reversal of 1862661 is 1662681.

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.

It is not a de Polignac number, because 1862661 - 2¹ = 1862659 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1862669) 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, 310441 + ... + 310446.

It is an arithmetic number, because the mean of its divisors is an integer number (620888).

2^1862661 is an apocalyptic number.

It is an amenable number.

1862661 is a deficient number, since it is larger than the sum of its proper divisors (620891).

1862661 is an equidigital number, since it uses as much as digits as its factorization.

1862661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620890.

The product of its digits is 3456, while the sum is 30.

The square root of 1862661 is about 1364.7933909570. The cubic root of 1862661 is about 123.0395140414.

The spelling of 1862661 in words is "one million, eight hundred sixty-two thousand, six hundred sixty-one".