521420467 has 2 divisors, whose sum is σ = 521420468. Its totient is φ = 521420466.

The previous prime is 521420441. The next prime is 521420489. The reversal of 521420467 is 764024125.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521420467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521420407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260710233 + 260710234.

It is an arithmetic number, because the mean of its divisors is an integer number (260710234).

Almost surely, 2^521420467 is an apocalyptic number.

521420467 is a deficient number, since it is larger than the sum of its proper divisors (1).

521420467 is an equidigital number, since it uses as much as digits as its factorization.

521420467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 521420467 is about 22834.6330603318. The cubic root of 521420467 is about 804.8767050087.

The spelling of 521420467 in words is "five hundred twenty-one million, four hundred twenty thousand, four hundred sixty-seven".