61481 has 4 divisors (see below), whose sum is σ = 70272. Its totient is φ = 52692.

The previous prime is 61471. The next prime is 61483. The reversal of 61481 is 18416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61481 - 2⁶ = 61417 is a prime.

It is a super-2 number, since 2×61481² = 7559826722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 61481.

It is not an unprimeable number, because it can be changed into a prime (61483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4385 + ... + 4398.

It is an arithmetic number, because the mean of its divisors is an integer number (17568).

2⁶¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

61481 is a deficient number, since it is larger than the sum of its proper divisors (8791).

61481 is an equidigital number, since it uses as much as digits as its factorization.

61481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8790.

The product of its digits is 192, while the sum is 20.

The square root of 61481 is about 247.9536246962. The cubic root of 61481 is about 39.4681685549.

Adding to 61481 its reverse (18416), we get a palindrome (79897).

The spelling of 61481 in words is "sixty-one thousand, four hundred eighty-one".