1904145 has 8 divisors (see below), whose sum is σ = 3046656. Its totient is φ = 1015536.

The previous prime is 1904143. The next prime is 1904167. The reversal of 1904145 is 5414091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1904145 - 2¹ = 1904143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1904143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63457 + ... + 63486.

It is an arithmetic number, because the mean of its divisors is an integer number (380832).

2^1904145 is an apocalyptic number.

1904145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1904145 is a deficient number, since it is larger than the sum of its proper divisors (1142511).

1904145 is a wasteful number, since it uses less digits than its factorization.

1904145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126951.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1904145 is about 1379.9076056026. The cubic root of 1904145 is about 123.9462349294.

The spelling of 1904145 in words is "one million, nine hundred four thousand, one hundred forty-five".