261024013 has 2 divisors, whose sum is σ = 261024014. Its totient is φ = 261024012.

The previous prime is 261024007. The next prime is 261024019. The reversal of 261024013 is 310420162.

It is a balanced prime because it is at equal distance from previous prime (261024007) and next prime (261024019).

It can be written as a sum of positive squares in only one way, i.e., 225060004 + 35964009 = 15002^2 + 5997^2 .

It is a cyclic number.

It is not a de Polignac number, because 261024013 - 2⁵ = 261023981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261024019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130512006 + 130512007.

It is an arithmetic number, because the mean of its divisors is an integer number (130512007).

Almost surely, 2^261024013 is an apocalyptic number.

It is an amenable number.

261024013 is a deficient number, since it is larger than the sum of its proper divisors (1).

261024013 is an equidigital number, since it uses as much as digits as its factorization.

261024013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 261024013 is about 16156.2375880030. The cubic root of 261024013 is about 639.0872511298.

Adding to 261024013 its reverse (310420162), we get a palindrome (571444175).

The spelling of 261024013 in words is "two hundred sixty-one million, twenty-four thousand, thirteen".