1818729 has 12 divisors (see below), whose sum is σ = 2866032. Its totient is φ = 1102200.

The previous prime is 1818727. The next prime is 1818743. The reversal of 1818729 is 9278181.

It is not a de Polignac number, because 1818729 - 2¹ = 1818727 is a prime.

It is an alternating number because its digits alternate between odd and even.

1818729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1818693 and 1818702.

It is not an unprimeable number, because it can be changed into a prime (1818721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9087 + ... + 9284.

It is an arithmetic number, because the mean of its divisors is an integer number (238836).

2^1818729 is an apocalyptic number.

It is an amenable number.

1818729 is a deficient number, since it is larger than the sum of its proper divisors (1047303).

1818729 is a wasteful number, since it uses less digits than its factorization.

1818729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18388 (or 18385 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1818729 is about 1348.6026101117. The cubic root of 1818729 is about 122.0644870933.

The spelling of 1818729 in words is "one million, eight hundred eighteen thousand, seven hundred twenty-nine".