61205321 has 8 divisors (see below), whose sum is σ = 65062440. Its totient is φ = 57376768.

The previous prime is 61205311. The next prime is 61205393. The reversal of 61205321 is 12350216.

It can be written as a sum of positive squares in 4 ways, for example, as 44689225 + 16516096 = 6685^2 + 4064^2 .

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

It is not a de Polignac number, because 61205321 - 2¹⁴ = 61188937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61205293 and 61205302.

It is not an unprimeable number, because it can be changed into a prime (61205311) 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, 2636 + ... + 11373.

It is an arithmetic number, because the mean of its divisors is an integer number (8132805).

Almost surely, 2^61205321 is an apocalyptic number.

It is an amenable number.

61205321 is a deficient number, since it is larger than the sum of its proper divisors (3857119).

61205321 is a wasteful number, since it uses less digits than its factorization.

61205321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14283.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 61205321 is about 7823.3829639102. The cubic root of 61205321 is about 394.0908879281.

Adding to 61205321 its reverse (12350216), we get a palindrome (73555537).

The spelling of 61205321 in words is "sixty-one million, two hundred five thousand, three hundred twenty-one".