285262981 has 2 divisors, whose sum is σ = 285262982. Its totient is φ = 285262980.

The previous prime is 285262969. The next prime is 285262993. The reversal of 285262981 is 189262582.

It is a balanced prime because it is at equal distance from previous prime (285262969) and next prime (285262993).

It can be written as a sum of positive squares in only one way, i.e., 284461956 + 801025 = 16866^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 285262981 - 2⁷ = 285262853 is a prime.

It is a super-2 number, since 2×285262981² = 162749936658012722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285262931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142631490 + 142631491.

It is an arithmetic number, because the mean of its divisors is an integer number (142631491).

Almost surely, 2^285262981 is an apocalyptic number.

It is an amenable number.

285262981 is a deficient number, since it is larger than the sum of its proper divisors (1).

285262981 is an equidigital number, since it uses as much as digits as its factorization.

285262981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 43.

The square root of 285262981 is about 16889.7300452079. The cubic root of 285262981 is about 658.2867879856.

The spelling of 285262981 in words is "two hundred eighty-five million, two hundred sixty-two thousand, nine hundred eighty-one".