4020099 has 4 divisors (see below), whose sum is σ = 5360136. Its totient is φ = 2680064.

The previous prime is 4020031. The next prime is 4020119. The reversal of 4020099 is 9900204.

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

It is a cyclic number.

It is not a de Polignac number, because 4020099 - 2⁸ = 4019843 is a prime.

It is a super-2 number, since 2×4020099² = 32322391939602, which contains 22 as substring.

It is a D-number.

4020099 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4021099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670014 + ... + 670019.

It is an arithmetic number, because the mean of its divisors is an integer number (1340034).

Almost surely, 2^4020099 is an apocalyptic number.

4020099 is a deficient number, since it is larger than the sum of its proper divisors (1340037).

4020099 is a wasteful number, since it uses less digits than its factorization.

4020099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340036.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 4020099 is about 2005.0184537804. The cubic root of 4020099 is about 159.0055375628.

The spelling of 4020099 in words is "four million, twenty thousand, ninety-nine".