420696281 has 2 divisors, whose sum is σ = 420696282. Its totient is φ = 420696280.

The previous prime is 420696239. The next prime is 420696293. The reversal of 420696281 is 182696024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383376400 + 37319881 = 19580^2 + 6109^2 .

It is a cyclic number.

It is not a de Polignac number, because 420696281 - 2²⁶ = 353587417 is a prime.

It is a super-2 number, since 2×420696281² = 353970721694461922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420695281) 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, 210348140 + 210348141.

It is an arithmetic number, because the mean of its divisors is an integer number (210348141).

Almost surely, 2^420696281 is an apocalyptic number.

It is an amenable number.

420696281 is a deficient number, since it is larger than the sum of its proper divisors (1).

420696281 is an equidigital number, since it uses as much as digits as its factorization.

420696281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 420696281 is about 20510.8820141894. The cubic root of 420696281 is about 749.3008483036.

The spelling of 420696281 in words is "four hundred twenty million, six hundred ninety-six thousand, two hundred eighty-one".