61243560 has 128 divisors (see below), whose sum is σ = 233337600. Its totient is φ = 13996800.

The previous prime is 61243519. The next prime is 61243579. The reversal of 61243560 is 6534216.

61243560 is a `hidden beast` number, since 61 + 2 + 43 + 560 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3510 + ... + 11610.

It is an arithmetic number, because the mean of its divisors is an integer number (1822950).

Almost surely, 2^61243560 is an apocalyptic number.

61243560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61243560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116668800).

61243560 is an abundant number, since it is smaller than the sum of its proper divisors (172094040).

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

61243560 is a wasteful number, since it uses less digits than its factorization.

61243560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8128 (or 8118 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 61243560 is about 7825.8264739259. The cubic root of 61243560 is about 394.1729423637.

Adding to 61243560 its reverse (6534216), we get a palindrome (67777776).

The spelling of 61243560 in words is "sixty-one million, two hundred forty-three thousand, five hundred sixty".