1378144 has 12 divisors (see below), whose sum is σ = 2713284. Its totient is φ = 689056.

The previous prime is 1378141. The next prime is 1378147. The reversal of 1378144 is 4418731.

1378144 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (1378141) and next prime (1378147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21502 + ... + 21565.

It is an arithmetic number, because the mean of its divisors is an integer number (226107).

2^1378144 is an apocalyptic number.

It is an amenable number.

1378144 is a deficient number, since it is larger than the sum of its proper divisors (1335140).

1378144 is an equidigital number, since it uses as much as digits as its factorization.

1378144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43077 (or 43069 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 1378144 is about 1173.9437805960. The cubic root of 1378144 is about 111.2836938720.

It can be divided in two parts, 137 and 8144, that added together give a square (8281 = 91²).

The spelling of 1378144 in words is "one million, three hundred seventy-eight thousand, one hundred forty-four".