4020917 has 4 divisors (see below), whose sum is σ = 4150656. Its totient is φ = 3891180.

The previous prime is 4020889. The next prime is 4020923. The reversal of 4020917 is 7190204.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4020917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4020892 and 4020901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020977) 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, 64823 + ... + 64884.

It is an arithmetic number, because the mean of its divisors is an integer number (1037664).

Almost surely, 2^4020917 is an apocalyptic number.

It is an amenable number.

4020917 is a deficient number, since it is larger than the sum of its proper divisors (129739).

4020917 is a wasteful number, since it uses less digits than its factorization.

4020917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129738.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 4020917 is about 2005.2224315522. Note that the first 3 decimals coincide. The cubic root of 4020917 is about 159.0163215185.

The spelling of 4020917 in words is "four million, twenty thousand, nine hundred seventeen".