61129115 has 4 divisors (see below), whose sum is σ = 73354944. Its totient is φ = 48903288.

The previous prime is 61129097. The next prime is 61129121. The reversal of 61129115 is 51192116.

61129115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61129115 - 2⁶ = 61129051 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6112907 + ... + 6112916.

It is an arithmetic number, because the mean of its divisors is an integer number (18338736).

Almost surely, 2^61129115 is an apocalyptic number.

61129115 is a deficient number, since it is larger than the sum of its proper divisors (12225829).

61129115 is a wasteful number, since it uses less digits than its factorization.

61129115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12225828.

The product of its digits is 540, while the sum is 26.

The square root of 61129115 is about 7818.5110475077. The cubic root of 61129115 is about 393.9272607437.

The spelling of 61129115 in words is "sixty-one million, one hundred twenty-nine thousand, one hundred fifteen".