1377685 has 8 divisors (see below), whose sum is σ = 1680696. Its totient is φ = 1083840.

The previous prime is 1377679. The next prime is 1377713. The reversal of 1377685 is 5867731.

It can be written as a sum of positive squares in 4 ways, for example, as 154449 + 1223236 = 393^2 + 1106^2 .

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

It is not a de Polignac number, because 1377685 - 2⁵ = 1377653 is a prime.

It is a Duffinian number.

1377685 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1954 + ... + 2563.

It is an arithmetic number, because the mean of its divisors is an integer number (210087).

2^1377685 is an apocalyptic number.

It is an amenable number.

1377685 is a deficient number, since it is larger than the sum of its proper divisors (303011).

1377685 is an equidigital number, since it uses as much as digits as its factorization.

1377685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4583.

The product of its digits is 35280, while the sum is 37.

The square root of 1377685 is about 1173.7482694343. The cubic root of 1377685 is about 111.2713379094.

It can be divided in two parts, 13776 and 85, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 1377685 in words is "one million, three hundred seventy-seven thousand, six hundred eighty-five".