1908145 has 4 divisors (see below), whose sum is σ = 2289780. Its totient is φ = 1526512.

The previous prime is 1908133. The next prime is 1908157. The reversal of 1908145 is 5418091.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1908133) and next prime (1908157).

It can be written as a sum of positive squares in 2 ways, for example, as 1083681 + 824464 = 1041^2 + 908^2 .

It is a cyclic number.

It is not a de Polignac number, because 1908145 - 2¹⁹ = 1383857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190810 + ... + 190819.

It is an arithmetic number, because the mean of its divisors is an integer number (572445).

2^1908145 is an apocalyptic number.

It is an amenable number.

1908145 is a deficient number, since it is larger than the sum of its proper divisors (381635).

1908145 is an equidigital number, since it uses as much as digits as its factorization.

1908145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381634.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1908145 is about 1381.3562176354. The cubic root of 1908145 is about 124.0329647009.

The spelling of 1908145 in words is "one million, nine hundred eight thousand, one hundred forty-five".