61281301 has 2 divisors, whose sum is σ = 61281302. Its totient is φ = 61281300.

The previous prime is 61281299. The next prime is 61281313. The reversal of 61281301 is 10318216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33466225 + 27815076 = 5785^2 + 5274^2 .

It is a cyclic number.

It is not a de Polignac number, because 61281301 - 2¹ = 61281299 is a prime.

Together with 61281299, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61281371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30640650 + 30640651.

It is an arithmetic number, because the mean of its divisors is an integer number (30640651).

Almost surely, 2^61281301 is an apocalyptic number.

It is an amenable number.

61281301 is a deficient number, since it is larger than the sum of its proper divisors (1).

61281301 is an equidigital number, since it uses as much as digits as its factorization.

61281301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 61281301 is about 7828.2374133645. The cubic root of 61281301 is about 394.2538946914.

Adding to 61281301 its reverse (10318216), we get a palindrome (71599517).

The spelling of 61281301 in words is "sixty-one million, two hundred eighty-one thousand, three hundred one".