1904139 has 6 divisors (see below), whose sum is σ = 2750436. Its totient is φ = 1269420.

The previous prime is 1904129. The next prime is 1904143. The reversal of 1904139 is 9314091.

It is not a de Polignac number, because 1904139 - 2⁷ = 1904011 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1904129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105777 + ... + 105794.

It is an arithmetic number, because the mean of its divisors is an integer number (458406).

2^1904139 is an apocalyptic number.

1904139 is a deficient number, since it is larger than the sum of its proper divisors (846297).

1904139 is a wasteful number, since it uses less digits than its factorization.

1904139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211577 (or 211574 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1904139 is about 1379.9054315423. The cubic root of 1904139 is about 123.9461047435.

The spelling of 1904139 in words is "one million, nine hundred four thousand, one hundred thirty-nine".