1356445 has 4 divisors (see below), whose sum is σ = 1627740. Its totient is φ = 1085152.

The previous prime is 1356431. The next prime is 1356451. The reversal of 1356445 is 5446531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 811801 + 544644 = 901^2 + 738^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356445 - 2⁹ = 1355933 is a prime.

1356445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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, 135640 + ... + 135649.

It is an arithmetic number, because the mean of its divisors is an integer number (406935).

2^1356445 is an apocalyptic number.

It is an amenable number.

1356445 is a deficient number, since it is larger than the sum of its proper divisors (271295).

1356445 is an equidigital number, since it uses as much as digits as its factorization.

1356445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271294.

The product of its digits is 7200, while the sum is 28.

The square root of 1356445 is about 1164.6651879403. The cubic root of 1356445 is about 110.6965442064.

The spelling of 1356445 in words is "one million, three hundred fifty-six thousand, four hundred forty-five".