426551 has 2 divisors, whose sum is σ = 426552. Its totient is φ = 426550.

The previous prime is 426541. The next prime is 426553. The reversal of 426551 is 155624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 426551 - 2⁶ = 426487 is a prime.

It is a Sophie Germain prime.

Together with 426553, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426553) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213275 + 213276.

It is an arithmetic number, because the mean of its divisors is an integer number (213276).

2⁴²⁶⁵⁵¹ is an apocalyptic number.

426551 is a deficient number, since it is larger than the sum of its proper divisors (1).

426551 is an equidigital number, since it uses as much as digits as its factorization.

426551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 426551 is about 653.1087198928. The cubic root of 426551 is about 75.2760787894.

The spelling of 426551 in words is "four hundred twenty-six thousand, five hundred fifty-one".