61245613 has 16 divisors (see below), whose sum is σ = 72950976. Its totient is φ = 50682240.

The previous prime is 61245601. The next prime is 61245629. The reversal of 61245613 is 31654216.

61245613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61245613 is a prime.

It is a super-2 number, since 2×61245613² = 7502050223491538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61245643) 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 15 ways as a sum of consecutive naturals, for example, 7506 + ... + 13372.

It is an arithmetic number, because the mean of its divisors is an integer number (4559436).

Almost surely, 2^61245613 is an apocalyptic number.

It is an amenable number.

61245613 is a deficient number, since it is larger than the sum of its proper divisors (11705363).

61245613 is a wasteful number, since it uses less digits than its factorization.

61245613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5964.

The product of its digits is 4320, while the sum is 28.

The square root of 61245613 is about 7825.9576410814. The cubic root of 61245613 is about 394.1773467888.

Adding to 61245613 its reverse (31654216), we get a palindrome (92899829).

It can be divided in two parts, 612 and 45613, that added together give a square (46225 = 215²).

The spelling of 61245613 in words is "sixty-one million, two hundred forty-five thousand, six hundred thirteen".