1380155 has 16 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 925152.

The previous prime is 1380149. The next prime is 1380157. The reversal of 1380155 is 5510831.

It is a cyclic number.

It is not a de Polignac number, because 1380155 - 2¹⁴ = 1363771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1380155.

It is not an unprimeable number, because it can be changed into a prime (1380157) 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, 1226 + ... + 2064.

It is an arithmetic number, because the mean of its divisors is an integer number (120960).

2^1380155 is an apocalyptic number.

1380155 is a deficient number, since it is larger than the sum of its proper divisors (555205).

1380155 is an equidigital number, since it uses as much as digits as its factorization.

1380155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1380155 is about 1174.7999829758. The cubic root of 1380155 is about 111.3377962841.

Adding to 1380155 its reverse (5510831), we get a palindrome (6890986).

The spelling of 1380155 in words is "one million, three hundred eighty thousand, one hundred fifty-five".