1361643 has 8 divisors (see below), whose sum is σ = 1829328. Its totient is φ = 900864.

The previous prime is 1361629. The next prime is 1361677. The reversal of 1361643 is 3461631.

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

It is not a de Polignac number, because 1361643 - 2⁸ = 1361387 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 1246 + ... + 2067.

It is an arithmetic number, because the mean of its divisors is an integer number (228666).

2^1361643 is an apocalyptic number.

1361643 is a deficient number, since it is larger than the sum of its proper divisors (467685).

1361643 is a wasteful number, since it uses less digits than its factorization.

1361643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453.

The product of its digits is 1296, while the sum is 24.

The square root of 1361643 is about 1166.8945967824. The cubic root of 1361643 is about 110.8377631536.

The spelling of 1361643 in words is "one million, three hundred sixty-one thousand, six hundred forty-three".