1002154120 has 64 divisors (see below), whose sum is σ = 2469268800. Its totient is φ = 363022080.

The previous prime is 1002154093. The next prime is 1002154121. The reversal of 1002154120 is 214512001.

It is a junction number, because it is equal to n+sod(n) for n = 1002154094 and 1002154103.

It is not an unprimeable number, because it can be changed into a prime (1002154121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114127 + ... + 122593.

It is an arithmetic number, because the mean of its divisors is an integer number (38582325).

Almost surely, 2^1002154120 is an apocalyptic number.

1002154120 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 1002154120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234634400).

1002154120 is an abundant number, since it is smaller than the sum of its proper divisors (1467114680).

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

1002154120 is a wasteful number, since it uses less digits than its factorization.

1002154120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8758 (or 8754 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1002154120 is about 31656.8179070481. The cubic root of 1002154120 is about 1000.7175250347.

Adding to 1002154120 its reverse (214512001), we get a palindrome (1216666121).

The spelling of 1002154120 in words is "one billion, two million, one hundred fifty-four thousand, one hundred twenty".