61280 has 24 divisors (see below), whose sum is σ = 145152. Its totient is φ = 24448.

The previous prime is 61261. The next prime is 61283. The reversal of 61280 is 8216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61283) by changing a digit.

61280 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32 + ... + 351.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

2⁶¹²⁸⁰ is an apocalyptic number.

It is an amenable number.

61280 is an abundant number, since it is smaller than the sum of its proper divisors (83872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72576).

61280 is a wasteful number, since it uses less digits than its factorization.

61280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 61280 is about 247.5479751483. The cubic root of 61280 is about 39.4251104673.

Adding to 61280 its reverse (8216), we get a palindrome (69496).

The spelling of 61280 in words is "sixty-one thousand, two hundred eighty".