4078981 has 4 divisors (see below), whose sum is σ = 4256352. Its totient is φ = 3901612.

The previous prime is 4078969. The next prime is 4078993. The reversal of 4078981 is 1898704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (4078969) and next prime (4078993).

It is a cyclic number.

It is not a de Polignac number, because 4078981 - 2⁹ = 4078469 is a prime.

It is a super-2 number, since 2×4078981² = 33276171996722, 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 4078981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4078951) 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 3 ways as a sum of consecutive naturals, for example, 88651 + ... + 88696.

It is an arithmetic number, because the mean of its divisors is an integer number (1064088).

Almost surely, 2^4078981 is an apocalyptic number.

It is an amenable number.

4078981 is a deficient number, since it is larger than the sum of its proper divisors (177371).

4078981 is a wasteful number, since it uses less digits than its factorization.

4078981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177370.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 4078981 is about 2019.6487318343. The cubic root of 4078981 is about 159.7780908067.

The spelling of 4078981 in words is "four million, seventy-eight thousand, nine hundred eighty-one".