61245013 has 4 divisors (see below), whose sum is σ = 63356940. Its totient is φ = 59133088.

The previous prime is 61245011. The next prime is 61245047. The reversal of 61245013 is 31054216.

61245013 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 can be written as a sum of positive squares in 2 ways, for example, as 23213124 + 38031889 = 4818^2 + 6167^2 .

It is not a de Polignac number, because 61245013 - 2¹ = 61245011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61245011) by changing a digit.

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, 1055920 + ... + 1055977.

It is an arithmetic number, because the mean of its divisors is an integer number (15839235).

Almost surely, 2^61245013 is an apocalyptic number.

It is an amenable number.

61245013 is a deficient number, since it is larger than the sum of its proper divisors (2111927).

61245013 is a wasteful number, since it uses less digits than its factorization.

61245013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111926.

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

The square root of 61245013 is about 7825.9193070207. The cubic root of 61245013 is about 394.1760595826.

Adding to 61245013 its reverse (31054216), we get a palindrome (92299229).

The spelling of 61245013 in words is "sixty-one million, two hundred forty-five thousand, thirteen".