61120620 has 72 divisors (see below), whose sum is σ = 202260240. Its totient is φ = 14816640.

The previous prime is 61120601. The next prime is 61120643. The reversal of 61120620 is 2602116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 61120593 and 61120602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13455 + ... + 17414.

It is an arithmetic number, because the mean of its divisors is an integer number (2809170).

Almost surely, 2^61120620 is an apocalyptic number.

61120620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61120620 is an abundant number, since it is smaller than the sum of its proper divisors (141139620).

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

61120620 is a wasteful number, since it uses less digits than its factorization.

61120620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30895 (or 30890 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 61120620 is about 7817.9677666258. The cubic root of 61120620 is about 393.9090121175.

Adding to 61120620 its reverse (2602116), we get a palindrome (63722736).

The spelling of 61120620 in words is "sixty-one million, one hundred twenty thousand, six hundred twenty".