1356660 has 36 divisors (see below), whose sum is σ = 4115748. Its totient is φ = 361728.

The previous prime is 1356659. The next prime is 1356671. The reversal of 1356660 is 666531.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 820836 = 732^2 + 906^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 3589 + ... + 3948.

2^1356660 is an apocalyptic number.

1356660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1356660 is an abundant number, since it is smaller than the sum of its proper divisors (2759088).

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

1356660 is a wasteful number, since it uses less digits than its factorization.

1356660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552 (or 7547 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1356660 is about 1164.7574854879. The cubic root of 1356660 is about 110.7023924591.

It can be divided in two parts, 1356 and 660, that added together give a triangular number (2016 = T₆₃).

The spelling of 1356660 in words is "one million, three hundred fifty-six thousand, six hundred sixty".