1894139 has 4 divisors (see below), whose sum is σ = 2039856. Its totient is φ = 1748424.

The previous prime is 1894127. The next prime is 1894163. The reversal of 1894139 is 9314981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1894139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1894099 and 1894108.

It is not an unprimeable number, because it can be changed into a prime (1894339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72839 + ... + 72864.

It is an arithmetic number, because the mean of its divisors is an integer number (509964).

2^1894139 is an apocalyptic number.

1894139 is a deficient number, since it is larger than the sum of its proper divisors (145717).

1894139 is a wasteful number, since it uses less digits than its factorization.

1894139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145716.

The product of its digits is 7776, while the sum is 35.

The square root of 1894139 is about 1376.2772249805. The cubic root of 1894139 is about 123.7287471580.

The spelling of 1894139 in words is "one million, eight hundred ninety-four thousand, one hundred thirty-nine".