3721139 has 8 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 3633256.

The previous prime is 3721129. The next prime is 3721141. The reversal of 3721139 is 9311273.

3721139 = 10² + 11² + ... + 223².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3721139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3721129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8672 + ... + 9090.

It is an arithmetic number, because the mean of its divisors is an integer number (476280).

Almost surely, 2^3721139 is an apocalyptic number.

3721139 is a deficient number, since it is larger than the sum of its proper divisors (89101).

3721139 is a wasteful number, since it uses less digits than its factorization.

3721139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609.

The product of its digits is 1134, while the sum is 26.

The square root of 3721139 is about 1929.0254015953. The cubic root of 3721139 is about 154.9620302416.

Adding to 3721139 its product of digits (1134), we get a palindrome (3722273).

The spelling of 3721139 in words is "three million, seven hundred twenty-one thousand, one hundred thirty-nine".