1388555 has 16 divisors (see below), whose sum is σ = 1928640. Its totient is φ = 940032.

The previous prime is 1388483. The next prime is 1388587. The reversal of 1388555 is 5558831.

It is a cyclic number.

It is not a de Polignac number, because 1388555 - 2¹⁰ = 1387531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 3191 + ... + 3599.

It is an arithmetic number, because the mean of its divisors is an integer number (120540).

2^1388555 is an apocalyptic number.

1388555 is a deficient number, since it is larger than the sum of its proper divisors (540085).

1388555 is an equidigital number, since it uses as much as digits as its factorization.

1388555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its digits is 24000, while the sum is 35.

The square root of 1388555 is about 1178.3696364045. The cubic root of 1388555 is about 111.5632169815.

The spelling of 1388555 in words is "one million, three hundred eighty-eight thousand, five hundred fifty-five".