4077981 has 12 divisors (see below), whose sum is σ = 5931900. Its totient is φ = 2699520.

The previous prime is 4077971. The next prime is 4078003. The reversal of 4077981 is 1897704.

It can be written as a sum of positive squares in 2 ways, for example, as 2452356 + 1625625 = 1566^2 + 1275^2 .

It is not a de Polignac number, because 4077981 - 2⁵ = 4077949 is a prime.

It is a super-2 number, since 2×4077981² = 33259858072722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4077971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (494325).

Almost surely, 2^4077981 is an apocalyptic number.

It is an amenable number.

4077981 is a deficient number, since it is larger than the sum of its proper divisors (1853919).

4077981 is a wasteful number, since it uses less digits than its factorization.

4077981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 4077981 is about 2019.4011488558. The cubic root of 4077981 is about 159.7650327129.

The spelling of 4077981 in words is "four million, seventy-seven thousand, nine hundred eighty-one".