285346421 has 2 divisors, whose sum is σ = 285346422. Its totient is φ = 285346420.

The previous prime is 285346381. The next prime is 285346459. The reversal of 285346421 is 124643582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182628196 + 102718225 = 13514^2 + 10135^2 .

It is a cyclic number.

It is not a de Polignac number, because 285346421 - 2¹⁰ = 285345397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285346021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142673210 + 142673211.

It is an arithmetic number, because the mean of its divisors is an integer number (142673211).

Almost surely, 2^285346421 is an apocalyptic number.

It is an amenable number.

285346421 is a deficient number, since it is larger than the sum of its proper divisors (1).

285346421 is an equidigital number, since it uses as much as digits as its factorization.

285346421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 35.

The square root of 285346421 is about 16892.2000047359. The cubic root of 285346421 is about 658.3509651351.

The spelling of 285346421 in words is "two hundred eighty-five million, three hundred forty-six thousand, four hundred twenty-one".