1391356 has 12 divisors (see below), whose sum is σ = 2481192. Its totient is φ = 682448.

The previous prime is 1391353. The next prime is 1391363. The reversal of 1391356 is 6531931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3070 + ... + 3493.

It is an arithmetic number, because the mean of its divisors is an integer number (206766).

2^1391356 is an apocalyptic number.

1391356 is the 631-st centered heptagonal number.

It is an amenable number.

1391356 is a deficient number, since it is larger than the sum of its proper divisors (1089836).

1391356 is a wasteful number, since it uses less digits than its factorization.

1391356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620 (or 6618 counting only the distinct ones).

The product of its digits is 2430, while the sum is 28.

The square root of 1391356 is about 1179.5575441665. The cubic root of 1391356 is about 111.6381818882.

The spelling of 1391356 in words is "one million, three hundred ninety-one thousand, three hundred fifty-six".