2139941 has 4 divisors (see below), whose sum is σ = 2175084. Its totient is φ = 2104800.

The previous prime is 2139937. The next prime is 2139947. The reversal of 2139941 is 1499312.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 863041 + 1276900 = 929^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139941 - 2² = 2139937 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139947) 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, 17480 + ... + 17601.

It is an arithmetic number, because the mean of its divisors is an integer number (543771).

2^2139941 is an apocalyptic number.

It is an amenable number.

2139941 is a deficient number, since it is larger than the sum of its proper divisors (35143).

2139941 is an equidigital number, since it uses as much as digits as its factorization.

2139941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35142.

The product of its digits is 1944, while the sum is 29.

The square root of 2139941 is about 1462.8537179089. The cubic root of 2139941 is about 128.8646899619.

The spelling of 2139941 in words is "two million, one hundred thirty-nine thousand, nine hundred forty-one".