3972145 has 8 divisors (see below), whose sum is σ = 4777920. Its totient is φ = 3170160.

The previous prime is 3972139. The next prime is 3972151. The reversal of 3972145 is 5412793.

3972145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3972139) and next prime (3972151).

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

It is not a de Polignac number, because 3972145 - 2⁵ = 3972113 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2526 + ... + 3784.

It is an arithmetic number, because the mean of its divisors is an integer number (597240).

Almost surely, 2^3972145 is an apocalyptic number.

It is an amenable number.

3972145 is a deficient number, since it is larger than the sum of its proper divisors (805775).

3972145 is a wasteful number, since it uses less digits than its factorization.

3972145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895.

The product of its digits is 7560, while the sum is 31.

The square root of 3972145 is about 1993.0240841495. The cubic root of 3972145 is about 158.3707710795.

The spelling of 3972145 in words is "three million, nine hundred seventy-two thousand, one hundred forty-five".