1387125 has 40 divisors (see below), whose sum is σ = 2604888. Its totient is φ = 734400.

The previous prime is 1387123. The next prime is 1387129. The reversal of 1387125 is 5217831.

It can be written as a sum of positive squares in 4 ways, for example, as 39204 + 1347921 = 198^2 + 1161^2 .

It is not a de Polignac number, because 1387125 - 2¹ = 1387123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387121) 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 39 ways as a sum of consecutive naturals, for example, 10057 + ... + 10193.

2^1387125 is an apocalyptic number.

1387125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1387125 is a deficient number, since it is larger than the sum of its proper divisors (1217763).

1387125 is an equidigital number, since it uses as much as digits as its factorization.

1387125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 145 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 1387125 is about 1177.7627095472. The cubic root of 1387125 is about 111.5249061242.

The spelling of 1387125 in words is "one million, three hundred eighty-seven thousand, one hundred twenty-five".