128420552 has 16 divisors (see below), whose sum is σ = 259310940. Its totient is φ = 59270976.

The previous prime is 128420549. The next prime is 128420573. The reversal of 128420552 is 255024821.

It can be written as a sum of positive squares in 2 ways, for example, as 107205316 + 21215236 = 10354^2 + 4606^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617303 + ... + 617510.

Almost surely, 2^128420552 is an apocalyptic number.

It is an amenable number.

128420552 is an abundant number, since it is smaller than the sum of its proper divisors (130890388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128420552 is a wasteful number, since it uses less digits than its factorization.

128420552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234832 (or 1234828 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 128420552 is about 11332.2792058791. The cubic root of 128420552 is about 504.5197564951.

The spelling of 128420552 in words is "one hundred twenty-eight million, four hundred twenty thousand, five hundred fifty-two".