1388025 has 36 divisors (see below), whose sum is σ = 2579200. Its totient is φ = 712800.

The previous prime is 1388021. The next prime is 1388029. The reversal of 1388025 is 5208831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1388021) and next prime (1388029).

It is not a de Polignac number, because 1388025 - 2² = 1388021 is a prime.

It is a super-2 number, since 2×1388025² = 3853226801250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388025.

It is not an unprimeable number, because it can be changed into a prime (1388021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6876 + ... + 7074.

2^1388025 is an apocalyptic number.

1388025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388025 is a deficient number, since it is larger than the sum of its proper divisors (1191175).

1388025 is a wasteful number, since it uses less digits than its factorization.

1388025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1388025 is about 1178.1447279515. The cubic root of 1388025 is about 111.5490209217.

The spelling of 1388025 in words is "one million, three hundred eighty-eight thousand, twenty-five".