4071945 has 8 divisors (see below), whose sum is σ = 6515136. Its totient is φ = 2171696.

The previous prime is 4071941. The next prime is 4071953. The reversal of 4071945 is 5491704.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4071945 - 2² = 4071941 is a prime.

It is an Ulam number.

4071945 is a lucky number.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (4071941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135717 + ... + 135746.

It is an arithmetic number, because the mean of its divisors is an integer number (814392).

Almost surely, 2^4071945 is an apocalyptic number.

It is an amenable number.

4071945 is a deficient number, since it is larger than the sum of its proper divisors (2443191).

4071945 is a wasteful number, since it uses less digits than its factorization.

4071945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271471.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 4071945 is about 2017.9060929587. The cubic root of 4071945 is about 159.6861686936.

The spelling of 4071945 in words is "four million, seventy-one thousand, nine hundred forty-five".