261145337 has 2 divisors, whose sum is σ = 261145338. Its totient is φ = 261145336.

The previous prime is 261145327. The next prime is 261145343. The reversal of 261145337 is 733541162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244734736 + 16410601 = 15644^2 + 4051^2 .

It is a cyclic number.

It is not a de Polignac number, because 261145337 - 2¹⁰ = 261144313 is a prime.

It is not a weakly prime, because it can be changed into another prime (261145327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130572668 + 130572669.

It is an arithmetic number, because the mean of its divisors is an integer number (130572669).

Almost surely, 2^261145337 is an apocalyptic number.

It is an amenable number.

261145337 is a deficient number, since it is larger than the sum of its proper divisors (1).

261145337 is an equidigital number, since it uses as much as digits as its factorization.

261145337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 261145337 is about 16159.9918626217. The cubic root of 261145337 is about 639.1862517426.

Adding to 261145337 its reverse (733541162), we get a palindrome (994686499).

The spelling of 261145337 in words is "two hundred sixty-one million, one hundred forty-five thousand, three hundred thirty-seven".