1860121 has 4 divisors (see below), whose sum is σ = 1887952. Its totient is φ = 1832292.

The previous prime is 1860109. The next prime is 1860127. The reversal of 1860121 is 1210681.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1210681 = 349 ⋅3469.

It is a cyclic number.

It is not a de Polignac number, because 1860121 - 2⁹ = 1859609 is a prime.

It is an Ulam number.

It is a Duffinian number.

1860121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1860127) 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, 13815 + ... + 13948.

It is an arithmetic number, because the mean of its divisors is an integer number (471988).

2^1860121 is an apocalyptic number.

It is an amenable number.

1860121 is a deficient number, since it is larger than the sum of its proper divisors (27831).

1860121 is an equidigital number, since it uses as much as digits as its factorization.

1860121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27830.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1860121 is about 1363.8625297294. The cubic root of 1860121 is about 122.9835613786.

The spelling of 1860121 in words is "one million, eight hundred sixty thousand, one hundred twenty-one".