1641139 has 4 divisors (see below), whose sum is σ = 1697760. Its totient is φ = 1584520.

The previous prime is 1641137. The next prime is 1641161. The reversal of 1641139 is 9311461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641139 - 2¹ = 1641137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641131) 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, 28267 + ... + 28324.

It is an arithmetic number, because the mean of its divisors is an integer number (424440).

2^1641139 is an apocalyptic number.

1641139 is a deficient number, since it is larger than the sum of its proper divisors (56621).

1641139 is an equidigital number, since it uses as much as digits as its factorization.

1641139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56620.

The product of its digits is 648, while the sum is 25.

The square root of 1641139 is about 1281.0694750871. The cubic root of 1641139 is about 117.9546651473.

The spelling of 1641139 in words is "one million, six hundred forty-one thousand, one hundred thirty-nine".