1388481 has 4 divisors (see below), whose sum is σ = 1851312. Its totient is φ = 925652.

The previous prime is 1388479. The next prime is 1388483. The reversal of 1388481 is 1848831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1848831 = 3 ⋅616277.

It is an interprime number because it is at equal distance from previous prime (1388479) and next prime (1388483).

It is a cyclic number.

It is not a de Polignac number, because 1388481 - 2¹ = 1388479 is a prime.

It is a super-2 number, since 2×1388481² = 3855758974722, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1388483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231411 + ... + 231416.

It is an arithmetic number, because the mean of its divisors is an integer number (462828).

2^1388481 is an apocalyptic number.

It is an amenable number.

1388481 is a deficient number, since it is larger than the sum of its proper divisors (462831).

1388481 is an equidigital number, since it uses as much as digits as its factorization.

1388481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462830.

The product of its digits is 6144, while the sum is 33.

The square root of 1388481 is about 1178.3382366706. The cubic root of 1388481 is about 111.5612351072.

The spelling of 1388481 in words is "one million, three hundred eighty-eight thousand, four hundred eighty-one".