1820051 has 2 divisors, whose sum is σ = 1820052. Its totient is φ = 1820050.

The previous prime is 1820047. The next prime is 1820087. The reversal of 1820051 is 1500281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1820051 - 2² = 1820047 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1820551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910025 + 910026.

It is an arithmetic number, because the mean of its divisors is an integer number (910026).

2^1820051 is an apocalyptic number.

1820051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820051 is an equidigital number, since it uses as much as digits as its factorization.

1820051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1820051 is about 1349.0926580484. The cubic root of 1820051 is about 122.0940553924.

The spelling of 1820051 in words is "one million, eight hundred twenty thousand, fifty-one".