1388211 has 32 divisors (see below), whose sum is σ = 2211840. Its totient is φ = 765600.

The previous prime is 1388183. The next prime is 1388227. The reversal of 1388211 is 1128831.

It is not a de Polignac number, because 1388211 - 2¹⁴ = 1371827 is a prime.

1388211 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1388011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23500 + ... + 23558.

It is an arithmetic number, because the mean of its divisors is an integer number (69120).

2^1388211 is an apocalyptic number.

1388211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1388211 is a deficient number, since it is larger than the sum of its proper divisors (823629).

1388211 is a wasteful number, since it uses less digits than its factorization.

1388211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127.

The product of its digits is 384, while the sum is 24.

The square root of 1388211 is about 1178.2236629775. The cubic root of 1388211 is about 111.5540033467.

The spelling of 1388211 in words is "one million, three hundred eighty-eight thousand, two hundred eleven".