3721145 has 8 divisors (see below), whose sum is σ = 4477056. Its totient is φ = 2969136.

The previous prime is 3721141. The next prime is 3721153. The reversal of 3721145 is 5411273.

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

It is a cyclic number.

It is not a de Polignac number, because 3721145 - 2² = 3721141 is a prime.

It is a super-2 number, since 2×3721145² = 27693840222050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3721145.

It is not an unprimeable number, because it can be changed into a prime (3721141) 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, 1904 + ... + 3326.

It is an arithmetic number, because the mean of its divisors is an integer number (559632).

Almost surely, 2^3721145 is an apocalyptic number.

It is an amenable number.

3721145 is a deficient number, since it is larger than the sum of its proper divisors (755911).

3721145 is a wasteful number, since it uses less digits than its factorization.

3721145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951.

The product of its digits is 840, while the sum is 23.

The square root of 3721145 is about 1929.0269567842. The cubic root of 3721145 is about 154.9621135290.

The spelling of 3721145 in words is "three million, seven hundred twenty-one thousand, one hundred forty-five".