1904225 has 12 divisors (see below), whose sum is σ = 2403120. Its totient is φ = 1496400.

The previous prime is 1904191. The next prime is 1904233. The reversal of 1904225 is 5224091.

1904225 = T₄₉ + T₅₀ + ... + T₂₂₅.

It is not a de Polignac number, because 1904225 - 2⁸ = 1903969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1904225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 830 + ... + 2120.

It is an arithmetic number, because the mean of its divisors is an integer number (200260).

2^1904225 is an apocalyptic number.

It is an amenable number.

1904225 is a deficient number, since it is larger than the sum of its proper divisors (498895).

1904225 is a wasteful number, since it uses less digits than its factorization.

1904225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1904225 is about 1379.9365927462. The cubic root of 1904225 is about 123.9479707145.

The spelling of 1904225 in words is "one million, nine hundred four thousand, two hundred twenty-five".