1842661 has 2 divisors, whose sum is σ = 1842662. Its totient is φ = 1842660.

The previous prime is 1842641. The next prime is 1842667. The reversal of 1842661 is 1662481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1366561 + 476100 = 1169^2 + 690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1842661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1842667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921330 + 921331.

It is an arithmetic number, because the mean of its divisors is an integer number (921331).

2^1842661 is an apocalyptic number.

It is an amenable number.

1842661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1842661 is an equidigital number, since it uses as much as digits as its factorization.

1842661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 1842661 is about 1357.4464998666. The cubic root of 1842661 is about 122.5975566062.

The spelling of 1842661 in words is "one million, eight hundred forty-two thousand, six hundred sixty-one".