128457342 has 24 divisors (see below), whose sum is σ = 299734344. Its totient is φ = 39525264.

The previous prime is 128457341. The next prime is 128457359. The reversal of 128457342 is 243754821.

It is a happy number.

128457342 is a `hidden beast` number, since 1 + 2 + 84 + 573 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 128457297 and 128457306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128457341) 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, 274248 + ... + 274715.

It is an arithmetic number, because the mean of its divisors is an integer number (12488931).

Almost surely, 2^128457342 is an apocalyptic number.

128457342 is an abundant number, since it is smaller than the sum of its proper divisors (171277002).

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

128457342 is a wasteful number, since it uses less digits than its factorization.

128457342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548984 (or 548981 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 128457342 is about 11333.9023288539. The cubic root of 128457342 is about 504.5679302735.

The spelling of 128457342 in words is "one hundred twenty-eight million, four hundred fifty-seven thousand, three hundred forty-two".