1387625 has 16 divisors (see below), whose sum is σ = 1836432. Its totient is φ = 1043200.

The previous prime is 1387601. The next prime is 1387649. The reversal of 1387625 is 5267831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1387601) and next prime (1387649).

It can be written as a sum of positive squares in 8 ways, for example, as 440896 + 946729 = 664^2 + 973^2 .

It is not a de Polignac number, because 1387625 - 2¹⁶ = 1322089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1387591 and 1387600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1799 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (114777).

2^1387625 is an apocalyptic number.

It is an amenable number.

1387625 is a deficient number, since it is larger than the sum of its proper divisors (448807).

1387625 is an equidigital number, since it uses as much as digits as its factorization.

1387625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 675 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 1387625 is about 1177.9749572890. The cubic root of 1387625 is about 111.5383045213.

The spelling of 1387625 in words is "one million, three hundred eighty-seven thousand, six hundred twenty-five".