4005061 has 4 divisors (see below), whose sum is σ = 4009824. Its totient is φ = 4000300.

The previous prime is 4005049. The next prime is 4005091. The reversal of 4005061 is 1605004.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4005061 - 2⁷ = 4004933 is a prime.

It is a super-2 number, since 2×4005061² = 32081027227442, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

4005061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (1002456).

Almost surely, 2^4005061 is an apocalyptic number.

It is an amenable number.

4005061 is a deficient number, since it is larger than the sum of its proper divisors (4763).

4005061 is a wasteful number, since it uses less digits than its factorization.

4005061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 4005061 is about 2001.2648500386. The cubic root of 4005061 is about 158.8070256204.

The spelling of 4005061 in words is "four million, five thousand, sixty-one".