1838145 has 32 divisors (see below), whose sum is σ = 3133440. Its totient is φ = 918720.

The previous prime is 1838143. The next prime is 1838167. The reversal of 1838145 is 5418381.

It is not a de Polignac number, because 1838145 - 2¹ = 1838143 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27402 + ... + 27468.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2^1838145 is an apocalyptic number.

1838145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1838145 is a deficient number, since it is larger than the sum of its proper divisors (1295295).

1838145 is a wasteful number, since it uses less digits than its factorization.

1838145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165.

The product of its digits is 3840, while the sum is 30.

The square root of 1838145 is about 1355.7820621324. The cubic root of 1838145 is about 122.4973205023.

The spelling of 1838145 in words is "one million, eight hundred thirty-eight thousand, one hundred forty-five".