1380356 has 6 divisors (see below), whose sum is σ = 2415630. Its totient is φ = 690176.

The previous prime is 1380341. The next prime is 1380377. The reversal of 1380356 is 6530831.

It can be written as a sum of positive squares in only one way, i.e., 1032256 + 348100 = 1016^2 + 590^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172541 + ... + 172548.

It is an arithmetic number, because the mean of its divisors is an integer number (402605).

2^1380356 is an apocalyptic number.

It is an amenable number.

1380356 is a deficient number, since it is larger than the sum of its proper divisors (1035274).

1380356 is a wasteful number, since it uses less digits than its factorization.

1380356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345093 (or 345091 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1380356 is about 1174.8855263386. The cubic root of 1380356 is about 111.3432009453.

The spelling of 1380356 in words is "one million, three hundred eighty thousand, three hundred fifty-six".