61020915 has 32 divisors (see below), whose sum is σ = 100650816. Its totient is φ = 31549440.

The previous prime is 61020907. The next prime is 61020917. The reversal of 61020915 is 51902016.

It is not a de Polignac number, because 61020915 - 2³ = 61020907 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (61020917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192337 + ... + 192653.

It is an arithmetic number, because the mean of its divisors is an integer number (3145338).

Almost surely, 2^61020915 is an apocalyptic number.

61020915 is a deficient number, since it is larger than the sum of its proper divisors (39629901).

61020915 is a wasteful number, since it uses less digits than its factorization.

61020915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 61020915 is about 7811.5885068275. The cubic root of 61020915 is about 393.6947032450.

The spelling of 61020915 in words is "sixty-one million, twenty thousand, nine hundred fifteen".