1388961 has 16 divisors (see below), whose sum is σ = 2352000. Its totient is φ = 793584.

The previous prime is 1388953. The next prime is 1388963. The reversal of 1388961 is 1698831.

It is not a de Polignac number, because 1388961 - 2³ = 1388953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3486 + ... + 3863.

It is an arithmetic number, because the mean of its divisors is an integer number (147000).

2^1388961 is an apocalyptic number.

It is an amenable number.

1388961 is a deficient number, since it is larger than the sum of its proper divisors (963039).

1388961 is an equidigital number, since it uses as much as digits as its factorization.

1388961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7365 (or 7359 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1388961 is about 1178.5418957339. The cubic root of 1388961 is about 111.5740892558.

The spelling of 1388961 in words is "one million, three hundred eighty-eight thousand, nine hundred sixty-one".