1959121 has 4 divisors (see below), whose sum is σ = 1984000. Its totient is φ = 1934244.

The previous prime is 1959091. The next prime is 1959149. The reversal of 1959121 is 1219591.

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: 1219591 = 19 ⋅64189.

It is a cyclic number.

It is not a de Polignac number, because 1959121 - 2⁷ = 1958993 is a prime.

It is a Duffinian number.

1959121 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1959121.

It is not an unprimeable number, because it can be changed into a prime (1959151) 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, 12321 + ... + 12478.

It is an arithmetic number, because the mean of its divisors is an integer number (496000).

2^1959121 is an apocalyptic number.

It is an amenable number.

1959121 is a deficient number, since it is larger than the sum of its proper divisors (24879).

1959121 is an equidigital number, since it uses as much as digits as its factorization.

1959121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24878.

The product of its digits is 810, while the sum is 28.

The square root of 1959121 is about 1399.6860362238. The cubic root of 1959121 is about 125.1277839922.

It can be divided in two parts, 1959 and 121, that added together give a triangular number (2080 = T₆₄).

The spelling of 1959121 in words is "one million, nine hundred fifty-nine thousand, one hundred twenty-one".