61271321 has 2 divisors, whose sum is σ = 61271322. Its totient is φ = 61271320.

The previous prime is 61271317. The next prime is 61271341. The reversal of 61271321 is 12317216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31416025 + 29855296 = 5605^2 + 5464^2 .

It is a cyclic number.

It is not a de Polignac number, because 61271321 - 2² = 61271317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61271341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30635660 + 30635661.

It is an arithmetic number, because the mean of its divisors is an integer number (30635661).

Almost surely, 2^61271321 is an apocalyptic number.

It is an amenable number.

61271321 is a deficient number, since it is larger than the sum of its proper divisors (1).

61271321 is an equidigital number, since it uses as much as digits as its factorization.

61271321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 23.

The square root of 61271321 is about 7827.5999514538. The cubic root of 61271321 is about 394.2324913845.

Adding to 61271321 its reverse (12317216), we get a palindrome (73588537).

The spelling of 61271321 in words is "sixty-one million, two hundred seventy-one thousand, three hundred twenty-one".