1388735 has 4 divisors (see below), whose sum is σ = 1666488. Its totient is φ = 1110984.

The previous prime is 1388719. The next prime is 1388743. The reversal of 1388735 is 5378831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1388735 - 2⁴ = 1388719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388695 and 1388704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138869 + ... + 138878.

It is an arithmetic number, because the mean of its divisors is an integer number (416622).

2^1388735 is an apocalyptic number.

1388735 is a deficient number, since it is larger than the sum of its proper divisors (277753).

1388735 is an equidigital number, since it uses as much as digits as its factorization.

1388735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277752.

The product of its digits is 20160, while the sum is 35.

The square root of 1388735 is about 1178.4460106428. The cubic root of 1388735 is about 111.5680374631.

The spelling of 1388735 in words is "one million, three hundred eighty-eight thousand, seven hundred thirty-five".