3981427 has 4 divisors (see below), whose sum is σ = 4029480. Its totient is φ = 3933376.

The previous prime is 3981421. The next prime is 3981449. The reversal of 3981427 is 7241893.

3981427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7241893 = 751 ⋅9643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3981427 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 3981392 and 3981401.

It is not an unprimeable number, because it can be changed into a prime (3981421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 23902 + ... + 24067.

It is an arithmetic number, because the mean of its divisors is an integer number (1007370).

Almost surely, 2^3981427 is an apocalyptic number.

3981427 is a deficient number, since it is larger than the sum of its proper divisors (48053).

3981427 is an equidigital number, since it uses as much as digits as its factorization.

3981427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48052.

The product of its digits is 12096, while the sum is 34.

The square root of 3981427 is about 1995.3513475075. The cubic root of 3981427 is about 158.4940339483.

The spelling of 3981427 in words is "three million, nine hundred eighty-one thousand, four hundred twenty-seven".