4020007 has 4 divisors (see below), whose sum is σ = 4256496. Its totient is φ = 3783520.

The previous prime is 4019993. The next prime is 4020011. The reversal of 4020007 is 7000204.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4020007 - 2⁷ = 4019879 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020017) 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, 118219 + ... + 118252.

It is an arithmetic number, because the mean of its divisors is an integer number (1064124).

Almost surely, 2^4020007 is an apocalyptic number.

4020007 is a deficient number, since it is larger than the sum of its proper divisors (236489).

4020007 is a wasteful number, since it uses less digits than its factorization.

4020007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236488.

The product of its (nonzero) digits is 56, while the sum is 13.

The square root of 4020007 is about 2004.9955112169. The cubic root of 4020007 is about 159.0043246058.

The spelling of 4020007 in words is "four million, twenty thousand, seven".