1814661 has 6 divisors (see below), whose sum is σ = 2621190. Its totient is φ = 1209768.

The previous prime is 1814653. The next prime is 1814669. The reversal of 1814661 is 1664181.

It is an interprime number because it is at equal distance from previous prime (1814653) and next prime (1814669).

It can be written as a sum of positive squares in only one way, i.e., 1252161 + 562500 = 1119^2 + 750^2 .

It is not a de Polignac number, because 1814661 - 2³ = 1814653 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1814669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100806 + ... + 100823.

It is an arithmetic number, because the mean of its divisors is an integer number (436865).

2^1814661 is an apocalyptic number.

It is an amenable number.

1814661 is a deficient number, since it is larger than the sum of its proper divisors (806529).

1814661 is a wasteful number, since it uses less digits than its factorization.

1814661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201635 (or 201632 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1814661 is about 1347.0935379550. The cubic root of 1814661 is about 121.9734108498.

The spelling of 1814661 in words is "one million, eight hundred fourteen thousand, six hundred sixty-one".