1816057 has 6 divisors (see below), whose sum is σ = 1899002. Its totient is φ = 1736592.

The previous prime is 1816051. The next prime is 1816063. The reversal of 1816057 is 7506181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1816051) and next prime (1816063).

It can be written as a sum of positive squares in only one way, i.e., 1430416 + 385641 = 1196^2 + 621^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1816057 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 (1816051) 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, 1188 + ... + 2245.

2^1816057 is an apocalyptic number.

It is an amenable number.

1816057 is a deficient number, since it is larger than the sum of its proper divisors (82945).

1816057 is an equidigital number, since it uses as much as digits as its factorization.

1816057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479 (or 3456 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1816057 is about 1347.6115909267. The cubic root of 1816057 is about 122.0046804618.

The spelling of 1816057 in words is "one million, eight hundred sixteen thousand, fifty-seven".