61247956 has 48 divisors (see below), whose sum is σ = 136507392. Its totient is φ = 23349600.

The previous prime is 61247947. The next prime is 61248017. The reversal of 61247956 is 65974216.

61247956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61247956² = 7502624228355872, which contains 22 as substring.

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, 12361 + ... + 16591.

It is an arithmetic number, because the mean of its divisors is an integer number (2843904).

Almost surely, 2^61247956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61247956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68253696).

61247956 is an abundant number, since it is smaller than the sum of its proper divisors (75259436).

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

61247956 is a wasteful number, since it uses less digits than its factorization.

61247956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300 (or 4298 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 61247956 is about 7826.1073337899. The cubic root of 61247956 is about 394.1823732481.

The spelling of 61247956 in words is "sixty-one million, two hundred forty-seven thousand, nine hundred fifty-six".