3721015 has 4 divisors (see below), whose sum is σ = 4465224. Its totient is φ = 2976808.

The previous prime is 3720989. The next prime is 3721027. The reversal of 3721015 is 5101273.

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 3721015 - 2⁷ = 3720887 is a prime.

It is a Duffinian number.

3721015 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3720983 and 3721001.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 372097 + ... + 372106.

It is an arithmetic number, because the mean of its divisors is an integer number (1116306).

Almost surely, 2^3721015 is an apocalyptic number.

3721015 is a deficient number, since it is larger than the sum of its proper divisors (744209).

3721015 is an equidigital number, since it uses as much as digits as its factorization.

3721015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744208.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 3721015 is about 1928.9932607451. The cubic root of 3721015 is about 154.9603089492.

Adding to 3721015 its reverse (5101273), we get a palindrome (8822288).

The spelling of 3721015 in words is "three million, seven hundred twenty-one thousand, fifteen".