285130961 has 2 divisors, whose sum is σ = 285130962. Its totient is φ = 285130960.

The previous prime is 285130921. The next prime is 285130969. The reversal of 285130961 is 169031582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261792400 + 23338561 = 16180^2 + 4831^2 .

It is a cyclic number.

It is not a de Polignac number, because 285130961 - 2¹⁰ = 285129937 is a prime.

It is not a weakly prime, because it can be changed into another prime (285130969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142565480 + 142565481.

It is an arithmetic number, because the mean of its divisors is an integer number (142565481).

Almost surely, 2^285130961 is an apocalyptic number.

It is an amenable number.

285130961 is a deficient number, since it is larger than the sum of its proper divisors (1).

285130961 is an equidigital number, since it uses as much as digits as its factorization.

285130961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 285130961 is about 16885.8213007245. The cubic root of 285130961 is about 658.1852203820.

The spelling of 285130961 in words is "two hundred eighty-five million, one hundred thirty thousand, nine hundred sixty-one".