61025720 has 64 divisors (see below), whose sum is σ = 165196800. Its totient is φ = 19820160.

The previous prime is 61025719. The next prime is 61025761. The reversal of 61025720 is 2752016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416 + ... + 11055.

It is an arithmetic number, because the mean of its divisors is an integer number (2581200).

Almost surely, 2^61025720 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 61025720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82598400).

61025720 is an abundant number, since it is smaller than the sum of its proper divisors (104171080).

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

61025720 is a wasteful number, since it uses less digits than its factorization.

61025720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11508 (or 11504 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 61025720 is about 7811.8960566562. The cubic root of 61025720 is about 393.7050366059.

Adding to 61025720 its reverse (2752016), we get a palindrome (63777736).

The spelling of 61025720 in words is "sixty-one million, twenty-five thousand, seven hundred twenty".