61534120 has 16 divisors (see below), whose sum is σ = 138451860. Its totient is φ = 24613632.

The previous prime is 61534117. The next prime is 61534133. The reversal of 61534120 is 2143516.

It can be written as a sum of positive squares in 2 ways, for example, as 58155876 + 3378244 = 7626^2 + 1838^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61534091 and 61534100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769137 + ... + 769216.

Almost surely, 2^61534120 is an apocalyptic number.

It is an amenable number.

61534120 is an abundant number, since it is smaller than the sum of its proper divisors (76917740).

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

61534120 is a wasteful number, since it uses less digits than its factorization.

61534120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538364 (or 1538360 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 61534120 is about 7844.3686807799. The cubic root of 61534120 is about 394.7953220430.

Adding to 61534120 its reverse (2143516), we get a palindrome (63677636).

The spelling of 61534120 in words is "sixty-one million, five hundred thirty-four thousand, one hundred twenty".