128697342 has 16 divisors (see below), whose sum is σ = 258703632. Its totient is φ = 42680960.

The previous prime is 128697329. The next prime is 128697383. The reversal of 128697342 is 243796821.

It is a junction number, because it is equal to n+sod(n) for n = 128697294 and 128697303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53259 + ... + 55622.

It is an arithmetic number, because the mean of its divisors is an integer number (16168977).

Almost surely, 2^128697342 is an apocalyptic number.

128697342 is an abundant number, since it is smaller than the sum of its proper divisors (130006290).

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

128697342 is a wasteful number, since it uses less digits than its factorization.

128697342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109083.

The product of its digits is 145152, while the sum is 42.

The square root of 128697342 is about 11344.4850918850. The cubic root of 128697342 is about 504.8819669901.

The spelling of 128697342 in words is "one hundred twenty-eight million, six hundred ninety-seven thousand, three hundred forty-two".