61245660 has 48 divisors (see below), whose sum is σ = 195987456. Its totient is φ = 13998912.

The previous prime is 61245659. The next prime is 61245671. The reversal of 61245660 is 6654216.

61245660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72492 + ... + 73331.

It is an arithmetic number, because the mean of its divisors is an integer number (4083072).

Almost surely, 2^61245660 is an apocalyptic number.

61245660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61245660 is an abundant number, since it is smaller than the sum of its proper divisors (134741796).

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

61245660 is a wasteful number, since it uses less digits than its factorization.

61245660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145842 (or 145840 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 61245660 is about 7825.9606439082. The cubic root of 61245660 is about 394.1774476195.

Adding to 61245660 its reverse (6654216), we get a palindrome (67899876).

The spelling of 61245660 in words is "sixty-one million, two hundred forty-five thousand, six hundred sixty".