1002099 has 24 divisors (see below), whose sum is σ = 1649808. Its totient is φ = 537600.

The previous prime is 1002091. The next prime is 1002101. The reversal of 1002099 is 9902001.

It is a happy number.

It is not a de Polignac number, because 1002099 - 2³ = 1002091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

1002099 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1002091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2299 + ... + 2699.

It is an arithmetic number, because the mean of its divisors is an integer number (68742).

2^1002099 is an apocalyptic number.

1002099 is a deficient number, since it is larger than the sum of its proper divisors (647709).

1002099 is a wasteful number, since it uses less digits than its factorization.

1002099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1002099 is about 1001.0489498521. The cubic root of 1002099 is about 100.0699177703.

The spelling of 1002099 in words is "one million, two thousand, ninety-nine".