1790121 has 4 divisors (see below), whose sum is σ = 2386832. Its totient is φ = 1193412.

The previous prime is 1790111. The next prime is 1790137. The reversal of 1790121 is 1210971.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1790121 - 2⁷ = 1789993 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1790111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298351 + ... + 298356.

It is an arithmetic number, because the mean of its divisors is an integer number (596708).

2^1790121 is an apocalyptic number.

It is an amenable number.

1790121 is a deficient number, since it is larger than the sum of its proper divisors (596711).

1790121 is an equidigital number, since it uses as much as digits as its factorization.

1790121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596710.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 1790121 is about 1337.9540350849. The cubic root of 1790121 is about 121.4210905261.

The spelling of 1790121 in words is "one million, seven hundred ninety thousand, one hundred twenty-one".