428551 has 2 divisors, whose sum is σ = 428552. Its totient is φ = 428550.

The previous prime is 428539. The next prime is 428557. The reversal of 428551 is 155824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428551 - 2⁹ = 428039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214275 + 214276.

It is an arithmetic number, because the mean of its divisors is an integer number (214276).

2⁴²⁸⁵⁵¹ is an apocalyptic number.

428551 is a deficient number, since it is larger than the sum of its proper divisors (1).

428551 is an equidigital number, since it uses as much as digits as its factorization.

428551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 25.

The square root of 428551 is about 654.6380679429. The cubic root of 428551 is about 75.3935461552.

It can be divided in two parts, 428 and 551, that added together give a palindrome (979).

The spelling of 428551 in words is "four hundred twenty-eight thousand, five hundred fifty-one".