1380156 has 12 divisors (see below), whose sum is σ = 3220392. Its totient is φ = 460048.

The previous prime is 1380149. The next prime is 1380157. The reversal of 1380156 is 6510831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380157) 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, 57495 + ... + 57518.

It is an arithmetic number, because the mean of its divisors is an integer number (268366).

2^1380156 is an apocalyptic number.

It is an amenable number.

1380156 is an abundant number, since it is smaller than the sum of its proper divisors (1840236).

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

1380156 is a wasteful number, since it uses less digits than its factorization.

1380156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115020 (or 115018 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1380156 is about 1174.8004085801. The cubic root of 1380156 is about 111.3378231742.

Adding to 1380156 its reverse (6510831), we get a palindrome (7890987).

The spelling of 1380156 in words is "one million, three hundred eighty thousand, one hundred fifty-six".