1381518 has 48 divisors (see below), whose sum is σ = 3234816. Its totient is φ = 425040.

The previous prime is 1381517. The next prime is 1381519. The reversal of 1381518 is 8151831.

It is an interprime number because it is at equal distance from previous prime (1381517) and next prime (1381519).

1381518 is a modest number, since divided by 1518 gives 138 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1381491 and 1381500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19423 + ... + 19493.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2^1381518 is an apocalyptic number.

1381518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1617408).

1381518 is an abundant number, since it is smaller than the sum of its proper divisors (1853298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1381518 is a wasteful number, since it uses less digits than its factorization.

1381518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 146 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 1381518 is about 1175.3799385731. The cubic root of 1381518 is about 111.3744355234.

The spelling of 1381518 in words is "one million, three hundred eighty-one thousand, five hundred eighteen".