1356745 has 8 divisors (see below), whose sum is σ = 1753416. Its totient is φ = 1001856.

The previous prime is 1356743. The next prime is 1356757. The reversal of 1356745 is 5476531.

It can be written as a sum of positive squares in 4 ways, for example, as 1849 + 1354896 = 43^2 + 1164^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1356745 - 2¹ = 1356743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356743) 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 7 ways as a sum of consecutive naturals, for example, 10372 + ... + 10501.

It is an arithmetic number, because the mean of its divisors is an integer number (219177).

2^1356745 is an apocalyptic number.

It is an amenable number.

1356745 is a deficient number, since it is larger than the sum of its proper divisors (396671).

1356745 is a wasteful number, since it uses less digits than its factorization.

1356745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891.

The product of its digits is 12600, while the sum is 31.

The square root of 1356745 is about 1164.7939731987. The cubic root of 1356745 is about 110.7047043886.

It can be divided in two parts, 135 and 6745, that multiplied together give a triangular number (910575 = T₁₃₄₉).

The spelling of 1356745 in words is "one million, three hundred fifty-six thousand, seven hundred forty-five".