1380121500 has 96 divisors (see below), whose sum is σ = 4117119552. Its totient is φ = 359040000.

The previous prime is 1380121499. The next prime is 1380121511. The reversal of 1380121500 is 51210831.

1380121500 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50280 + ... + 72720.

It is an arithmetic number, because the mean of its divisors is an integer number (42886662).

Almost surely, 2^1380121500 is an apocalyptic number.

1380121500 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 1380121500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058559776).

1380121500 is an abundant number, since it is smaller than the sum of its proper divisors (2736998052).

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

1380121500 is a wasteful number, since it uses less digits than its factorization.

1380121500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22504 (or 22492 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1380121500 is about 37149.9865410474. The cubic root of 1380121500 is about 1113.3689545617.

The spelling of 1380121500 in words is "one billion, three hundred eighty million, one hundred twenty-one thousand, five hundred".