1387875 has 16 divisors (see below), whose sum is σ = 2310048. Its totient is φ = 740000.

The previous prime is 1387871. The next prime is 1387877. The reversal of 1387875 is 5787831.

1387875 = 37² + 38² + ... + 161².

It is not a de Polignac number, because 1387875 - 2² = 1387871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1387871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1476 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (144378).

2^1387875 is an apocalyptic number.

1387875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1387875 is a deficient number, since it is larger than the sum of its proper divisors (922173).

1387875 is an equidigital number, since it uses as much as digits as its factorization.

1387875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719 (or 3709 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 1387875 is about 1178.0810668201. The cubic root of 1387875 is about 111.5450025128.

The spelling of 1387875 in words is "one million, three hundred eighty-seven thousand, eight hundred seventy-five".