61809125 has 16 divisors (see below), whose sum is σ = 88158720. Its totient is φ = 42382800.

The previous prime is 61809113. The next prime is 61809151. The reversal of 61809125 is 52190816.

It is not a de Polignac number, because 61809125 - 2¹⁰ = 61808101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61809091 and 61809100.

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, 34445 + ... + 36194.

It is an arithmetic number, because the mean of its divisors is an integer number (5509920).

Almost surely, 2^61809125 is an apocalyptic number.

It is an amenable number.

61809125 is a deficient number, since it is larger than the sum of its proper divisors (26349595).

61809125 is an equidigital number, since it uses as much as digits as its factorization.

61809125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70661 (or 70651 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 61809125 is about 7861.8779563155. The cubic root of 61809125 is about 395.3825807784.

The spelling of 61809125 in words is "sixty-one million, eight hundred nine thousand, one hundred twenty-five".