1904121 has 16 divisors (see below), whose sum is σ = 2851200. Its totient is φ = 1255824.

The previous prime is 1904117. The next prime is 1904129. The reversal of 1904121 is 1214091.

It is not a de Polignac number, because 1904121 - 2² = 1904117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1904094 and 1904103.

It is not an unprimeable number, because it can be changed into a prime (1904129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2620 + ... + 3266.

It is an arithmetic number, because the mean of its divisors is an integer number (178200).

2^1904121 is an apocalyptic number.

It is an amenable number.

1904121 is a deficient number, since it is larger than the sum of its proper divisors (947079).

1904121 is a wasteful number, since it uses less digits than its factorization.

1904121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1904121 is about 1379.8989093408. The cubic root of 1904121 is about 123.9457141843.

It can be divided in two parts, 1904 and 121, that added together give a square (2025 = 45²).

The spelling of 1904121 in words is "one million, nine hundred four thousand, one hundred twenty-one".