61141520 has 160 divisors (see below), whose sum is σ = 169382016. Its totient is φ = 20275200.

The previous prime is 61141519. The next prime is 61141543. The reversal of 61141520 is 2514116.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 61141492 and 61141501.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 912527 + ... + 912593.

Almost surely, 2^61141520 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 61141520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84691008).

61141520 is an abundant number, since it is smaller than the sum of its proper divisors (108240496).

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

61141520 is a wasteful number, since it uses less digits than its factorization.

61141520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 61141520 is about 7819.3043168814. The cubic root of 61141520 is about 393.9539056420.

Adding to 61141520 its reverse (2514116), we get a palindrome (63655636).

The spelling of 61141520 in words is "sixty-one million, one hundred forty-one thousand, five hundred twenty".