61206280 has 16 divisors (see below), whose sum is σ = 137714220. Its totient is φ = 24482496.

The previous prime is 61206259. The next prime is 61206281. The reversal of 61206280 is 8260216.

61206280 = 2013² + 2014² + ... + 2027².

It can be written as a sum of positive squares in 2 ways, for example, as 56821444 + 4384836 = 7538^2 + 2094^2 .

It is a super-2 number, since 2×61206280² = 7492417422876800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61206281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765039 + ... + 765118.

Almost surely, 2^61206280 is an apocalyptic number.

It is an amenable number.

61206280 is an abundant number, since it is smaller than the sum of its proper divisors (76507940).

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

61206280 is a wasteful number, since it uses less digits than its factorization.

61206280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530168 (or 1530164 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 61206280 is about 7823.4442542911. Note that the first 3 decimals coincide. The cubic root of 61206280 is about 394.0929461978.

Adding to 61206280 its reverse (8260216), we get a palindrome (69466496).

The spelling of 61206280 in words is "sixty-one million, two hundred six thousand, two hundred eighty".