1361605 has 8 divisors (see below), whose sum is σ = 1867392. Its totient is φ = 933648.

The previous prime is 1361603. The next prime is 1361609. The reversal of 1361605 is 5061631.

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 1361605 - 2¹ = 1361603 is a prime.

It is a Duffinian number.

1361605 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19417 + ... + 19486.

It is an arithmetic number, because the mean of its divisors is an integer number (233424).

2^1361605 is an apocalyptic number.

It is an amenable number.

1361605 is a deficient number, since it is larger than the sum of its proper divisors (505787).

1361605 is an equidigital number, since it uses as much as digits as its factorization.

1361605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38915.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1361605 is about 1166.8783141356. The cubic root of 1361605 is about 110.8367320771.

The spelling of 1361605 in words is "one million, three hundred sixty-one thousand, six hundred five".