1021602006 has 24 divisors (see below), whose sum is σ = 2219863464. Its totient is φ = 339550560.

The previous prime is 1021601981. The next prime is 1021602007. The reversal of 1021602006 is 6002061201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021602006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021602007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75535 + ... + 88026.

It is an arithmetic number, because the mean of its divisors is an integer number (92494311).

Almost surely, 2^1021602006 is an apocalyptic number.

1021602006 is an abundant number, since it is smaller than the sum of its proper divisors (1198261458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021602006 is a wasteful number, since it uses less digits than its factorization.

1021602006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163916 (or 163913 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1021602006 is about 31962.5093820870. The cubic root of 1021602006 is about 1007.1494324691.

Adding to 1021602006 its reverse (6002061201), we get a palindrome (7023663207).

The spelling of 1021602006 in words is "one billion, twenty-one million, six hundred two thousand, six".