820260451 has 2 divisors, whose sum is σ = 820260452. Its totient is φ = 820260450.

The previous prime is 820260449. The next prime is 820260481. The reversal of 820260451 is 154062028.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820260451 - 2¹ = 820260449 is a prime.

Together with 820260449, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (820260481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410130225 + 410130226.

It is an arithmetic number, because the mean of its divisors is an integer number (410130226).

Almost surely, 2^820260451 is an apocalyptic number.

820260451 is a deficient number, since it is larger than the sum of its proper divisors (1).

820260451 is an equidigital number, since it uses as much as digits as its factorization.

820260451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 820260451 is about 28640.1894372227. The cubic root of 820260451 is about 936.0892492118.

The spelling of 820260451 in words is "eight hundred twenty million, two hundred sixty thousand, four hundred fifty-one".