285145801 has 2 divisors, whose sum is σ = 285145802. Its totient is φ = 285145800.

The previous prime is 285145667. The next prime is 285145807. The reversal of 285145801 is 108541582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261145600 + 24000201 = 16160^2 + 4899^2 .

It is a cyclic number.

It is not a de Polignac number, because 285145801 - 2¹¹ = 285143753 is a prime.

It is equal to p_15490285 and since 285145801 and 15490285 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (285145807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142572900 + 142572901.

It is an arithmetic number, because the mean of its divisors is an integer number (142572901).

Almost surely, 2^285145801 is an apocalyptic number.

It is an amenable number.

285145801 is a deficient number, since it is larger than the sum of its proper divisors (1).

285145801 is an equidigital number, since it uses as much as digits as its factorization.

285145801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 285145801 is about 16886.2607169261. The cubic root of 285145801 is about 658.1966388769.

The spelling of 285145801 in words is "two hundred eighty-five million, one hundred forty-five thousand, eight hundred one".