1904061 has 4 divisors (see below), whose sum is σ = 2538752. Its totient is φ = 1269372.

The previous prime is 1904041. The next prime is 1904069. The reversal of 1904061 is 1604091.

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: 1604091 = 3 ⋅534697.

It is not a de Polignac number, because 1904061 - 2⁵ = 1904029 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1904069) 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 3 ways as a sum of consecutive naturals, for example, 317341 + ... + 317346.

It is an arithmetic number, because the mean of its divisors is an integer number (634688).

2^1904061 is an apocalyptic number.

It is an amenable number.

1904061 is a deficient number, since it is larger than the sum of its proper divisors (634691).

1904061 is an equidigital number, since it uses as much as digits as its factorization.

1904061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634690.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1904061 is about 1379.8771684465. The cubic root of 1904061 is about 123.9444123026.

The spelling of 1904061 in words is "one million, nine hundred four thousand, sixty-one".