61513125 has 40 divisors (see below), whose sum is σ = 104591520. Its totient is φ = 32136000.

The previous prime is 61513121. The next prime is 61513139. The reversal of 61513125 is 52131516.

It is not a de Polignac number, because 61513125 - 2² = 61513121 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61513095 and 61513104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61513121) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 99066 + ... + 99684.

It is an arithmetic number, because the mean of its divisors is an integer number (2614788).

Almost surely, 2^61513125 is an apocalyptic number.

It is an amenable number.

61513125 is a deficient number, since it is larger than the sum of its proper divisors (43078395).

61513125 is an equidigital number, since it uses as much as digits as its factorization.

61513125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 680 counting only the distinct ones).

The product of its digits is 900, while the sum is 24.

The square root of 61513125 is about 7843.0303454723. The cubic root of 61513125 is about 394.7504164923.

The spelling of 61513125 in words is "sixty-one million, five hundred thirteen thousand, one hundred twenty-five".