61420513 has 16 divisors (see below), whose sum is σ = 76991616. Its totient is φ = 47600640.

The previous prime is 61420477. The next prime is 61420543. The reversal of 61420513 is 31502416.

It is a cyclic number.

It is not a de Polignac number, because 61420513 - 2⁹ = 61420001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61420543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12795 + ... + 16927.

It is an arithmetic number, because the mean of its divisors is an integer number (4811976).

Almost surely, 2^61420513 is an apocalyptic number.

It is an amenable number.

61420513 is a deficient number, since it is larger than the sum of its proper divisors (15571103).

61420513 is a wasteful number, since it uses less digits than its factorization.

61420513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344.

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

The square root of 61420513 is about 7837.1240260698. The cubic root of 61420513 is about 394.5522095347.

Adding to 61420513 its reverse (31502416), we get a palindrome (92922929).

The spelling of 61420513 in words is "sixty-one million, four hundred twenty thousand, five hundred thirteen".