1021606002 has 24 divisors (see below), whose sum is σ = 2214570384. Its totient is φ = 340367544.

The previous prime is 1021605953. The next prime is 1021606031. The reversal of 1021606002 is 2006061201.

It is a happy number.

1021606002 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 60 + 600 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26773 + ... + 52535.

It is an arithmetic number, because the mean of its divisors is an integer number (92273766).

Almost surely, 2^1021606002 is an apocalyptic number.

1021606002 is an abundant number, since it is smaller than the sum of its proper divisors (1192964382).

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

1021606002 is a wasteful number, since it uses less digits than its factorization.

1021606002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27974 (or 27971 counting only the distinct ones).

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

The square root of 1021606002 is about 31962.5718927623. The cubic root of 1021606002 is about 1007.1507456236.

Adding to 1021606002 its reverse (2006061201), we get a palindrome (3027667203).

The spelling of 1021606002 in words is "one billion, twenty-one million, six hundred six thousand, two".