3972081 has 8 divisors (see below), whose sum is σ = 5305824. Its totient is φ = 2643200.

The previous prime is 3972071. The next prime is 3972091. The reversal of 3972081 is 1802793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3972071) and next prime (3972091).

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 3972081 - 2¹¹ = 3970033 is a prime.

It is a super-2 number, since 2×3972081² = 31554854941122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3972011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1681 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (663228).

Almost surely, 2^3972081 is an apocalyptic number.

It is an amenable number.

3972081 is a deficient number, since it is larger than the sum of its proper divisors (1333743).

3972081 is a wasteful number, since it uses less digits than its factorization.

3972081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 3972081 is about 1993.0080280822. The cubic root of 3972081 is about 158.3699205077.

The spelling of 3972081 in words is "three million, nine hundred seventy-two thousand, eighty-one".