128421052 has 36 divisors (see below), whose sum is σ = 239144976. Its totient is φ = 60227200.

The previous prime is 128421031. The next prime is 128421053. The reversal of 128421052 is 250124821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128421053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320052 + ... + 320452.

It is an arithmetic number, because the mean of its divisors is an integer number (6642916).

Almost surely, 2^128421052 is an apocalyptic number.

It is an amenable number.

128421052 is a deficient number, since it is larger than the sum of its proper divisors (110723924).

128421052 is a wasteful number, since it uses less digits than its factorization.

128421052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 128421052 is about 11332.3012667331. The cubic root of 128421052 is about 504.5204112697.

Adding to 128421052 its reverse (250124821), we get a palindrome (378545873).

The spelling of 128421052 in words is "one hundred twenty-eight million, four hundred twenty-one thousand, fifty-two".