128737242 has 16 divisors (see below), whose sum is σ = 286082880. Its totient is φ = 42912396.

The previous prime is 128737223. The next prime is 128737283. The reversal of 128737242 is 242737821.

128737242 is a `hidden beast` number, since 1 + 287 + 372 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 128737197 and 128737206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1191958 + ... + 1192065.

It is an arithmetic number, because the mean of its divisors is an integer number (17880180).

Almost surely, 2^128737242 is an apocalyptic number.

128737242 is an abundant number, since it is smaller than the sum of its proper divisors (157345638).

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

128737242 is a wasteful number, since it uses less digits than its factorization.

128737242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384034 (or 2384028 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 128737242 is about 11346.2435193327. The cubic root of 128737242 is about 504.9341377361.

The spelling of 128737242 in words is "one hundred twenty-eight million, seven hundred thirty-seven thousand, two hundred forty-two".