261602701 has 2 divisors, whose sum is σ = 261602702. Its totient is φ = 261602700.

The previous prime is 261602699. The next prime is 261602711. The reversal of 261602701 is 107206162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242549476 + 19053225 = 15574^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 261602701 - 2¹ = 261602699 is a prime.

Together with 261602699, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261602711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130801350 + 130801351.

It is an arithmetic number, because the mean of its divisors is an integer number (130801351).

Almost surely, 2^261602701 is an apocalyptic number.

It is an amenable number.

261602701 is a deficient number, since it is larger than the sum of its proper divisors (1).

261602701 is an equidigital number, since it uses as much as digits as its factorization.

261602701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 261602701 is about 16174.1367930409. The cubic root of 261602701 is about 639.5591861958.

Adding to 261602701 its reverse (107206162), we get a palindrome (368808863).

The spelling of 261602701 in words is "two hundred sixty-one million, six hundred two thousand, seven hundred one".