1387500 has 72 divisors (see below), whose sum is σ = 4155984. Its totient is φ = 360000.

The previous prime is 1387499. The next prime is 1387501. The reversal of 1387500 is 57831.

It is an interprime number because it is at equal distance from previous prime (1387499) and next prime (1387501).

It is not an unprimeable number, because it can be changed into a prime (1387501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37482 + ... + 37518.

It is an arithmetic number, because the mean of its divisors is an integer number (57722).

2^1387500 is an apocalyptic number.

1387500 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 1387500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077992).

1387500 is an abundant number, since it is smaller than the sum of its proper divisors (2768484).

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

1387500 is an equidigital number, since it uses as much as digits as its factorization.

1387500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 1387500 is about 1177.9218989390. The cubic root of 1387500 is about 111.5349552238.

The spelling of 1387500 in words is "one million, three hundred eighty-seven thousand, five hundred".