1002402100 has 108 divisors (see below), whose sum is σ = 2599701664. Its totient is φ = 328616640.

The previous prime is 1002402083. The next prime is 1002402109. The reversal of 1002402100 is 12042001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002402109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 368947 + ... + 371653.

Almost surely, 2^1002402100 is an apocalyptic number.

1002402100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002402100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299850832).

1002402100 is an abundant number, since it is smaller than the sum of its proper divisors (1597299564).

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

1002402100 is a wasteful number, since it uses less digits than its factorization.

1002402100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774 (or 2744 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1002402100 is about 31660.7343566128. The cubic root of 1002402100 is about 1000.8000597337.

Adding to 1002402100 its reverse (12042001), we get a palindrome (1014444101).

The spelling of 1002402100 in words is "one billion, two million, four hundred two thousand, one hundred".