4079781 has 16 divisors (see below), whose sum is σ = 6160320. Its totient is φ = 2667600.

The previous prime is 4079771. The next prime is 4079783. The reversal of 4079781 is 1879704.

It is not a de Polignac number, because 4079781 - 2⁷ = 4079653 is a prime.

It is a super-2 number, since 2×4079781² = 33289226015922, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4079783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6 + ... + 2856.

It is an arithmetic number, because the mean of its divisors is an integer number (385020).

Almost surely, 2^4079781 is an apocalyptic number.

It is an amenable number.

4079781 is a deficient number, since it is larger than the sum of its proper divisors (2080539).

4079781 is a wasteful number, since it uses less digits than its factorization.

4079781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913 (or 2907 counting only the distinct ones).

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

The square root of 4079781 is about 2019.8467763670. The cubic root of 4079781 is about 159.7885357452.

The spelling of 4079781 in words is "four million, seventy-nine thousand, seven hundred eighty-one".