1890051 has 4 divisors (see below), whose sum is σ = 2520072. Its totient is φ = 1260032.

The previous prime is 1890041. The next prime is 1890079. The reversal of 1890051 is 1500981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1890051 - 2⁵ = 1890019 is a prime.

It is a D-number.

1890051 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1890041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315006 + ... + 315011.

It is an arithmetic number, because the mean of its divisors is an integer number (630018).

2^1890051 is an apocalyptic number.

1890051 is a deficient number, since it is larger than the sum of its proper divisors (630021).

1890051 is an equidigital number, since it uses as much as digits as its factorization.

1890051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630020.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 1890051 is about 1374.7912568823. The cubic root of 1890051 is about 123.6396710771.

The spelling of 1890051 in words is "one million, eight hundred ninety thousand, fifty-one".