5661205 has 8 divisors (see below), whose sum is σ = 7411104. Its totient is φ = 4117200.

The previous prime is 5661203. The next prime is 5661209. The reversal of 5661205 is 5021665.

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

It is not a de Polignac number, because 5661205 - 2¹ = 5661203 is a prime.

It is a Duffinian number.

5661205 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5661205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661203) 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, 51411 + ... + 51520.

It is an arithmetic number, because the mean of its divisors is an integer number (926388).

Almost surely, 2^5661205 is an apocalyptic number.

5661205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5661205 is a deficient number, since it is larger than the sum of its proper divisors (1749899).

5661205 is a wasteful number, since it uses less digits than its factorization.

5661205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102947.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 5661205 is about 2379.3286868358. The cubic root of 5661205 is about 178.2254119400.

It can be divided in two parts, 566 and 1205, that added together give a palindrome (1771).

The spelling of 5661205 in words is "five million, six hundred sixty-one thousand, two hundred five".