1020099 has 8 divisors (see below), whose sum is σ = 1365520.
Its totient is φ = 677376.
The previous prime is 1020079. The next prime is 1020101. The reversal of 1020099 is 9900201.
It is a happy number.
1020099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a Cunningham number, because it is equal to 10102-1.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 1020099 - 27 = 1019971 is a prime.
It is a D-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 (1020049) 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, 507 + ... + 1515.
It is an arithmetic number, because the mean of its divisors is an integer number (170690).
21020099 is an apocalyptic number.
1020099 is a deficient number, since it is larger than the sum of its proper divisors (345421).
1020099 is a wasteful number, since it uses less digits than its factorization.
1020099 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1349.
The product of its (nonzero) digits is 162, while the sum is 21.
The square root of 1020099 is about 1009.9995049504.
Note that the first 3 decimals coincide.
The cubic root of 1020099 is about 100.6655275712.
The spelling of 1020099 in words is "one million, twenty thousand, ninety-nine".