280152461 has 2 divisors, whose sum is σ = 280152462. Its totient is φ = 280152460.

The previous prime is 280152451. The next prime is 280152463. The reversal of 280152461 is 164251082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231222436 + 48930025 = 15206^2 + 6995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280152461 is a prime.

Together with 280152463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280152463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140076230 + 140076231.

It is an arithmetic number, because the mean of its divisors is an integer number (140076231).

Almost surely, 2^280152461 is an apocalyptic number.

It is an amenable number.

280152461 is a deficient number, since it is larger than the sum of its proper divisors (1).

280152461 is an equidigital number, since it uses as much as digits as its factorization.

280152461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 280152461 is about 16737.7555544344. The cubic root of 280152461 is about 654.3319809786.

The spelling of 280152461 in words is "two hundred eighty million, one hundred fifty-two thousand, four hundred sixty-one".