425555128 has 8 divisors (see below), whose sum is σ = 797915880. Its totient is φ = 212777560.

The previous prime is 425555107. The next prime is 425555129. The reversal of 425555128 is 821555524.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425555129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26597188 + ... + 26597203.

It is an arithmetic number, because the mean of its divisors is an integer number (99739485).

Almost surely, 2^425555128 is an apocalyptic number.

It is an amenable number.

425555128 is a deficient number, since it is larger than the sum of its proper divisors (372360752).

425555128 is a wasteful number, since it uses less digits than its factorization.

425555128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53194397 (or 53194393 counting only the distinct ones).

The product of its digits is 80000, while the sum is 37.

The square root of 425555128 is about 20628.9875660440. The cubic root of 425555128 is about 752.1745058652.

The spelling of 425555128 in words is "four hundred twenty-five million, five hundred fifty-five thousand, one hundred twenty-eight".