128247742 has 32 divisors (see below), whose sum is σ = 224699904. Its totient is φ = 53762400.

The previous prime is 128247733. The next prime is 128247767. The reversal of 128247742 is 247742821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224317 + ... + 224887.

It is an arithmetic number, because the mean of its divisors is an integer number (7021872).

Almost surely, 2^128247742 is an apocalyptic number.

128247742 is a deficient number, since it is larger than the sum of its proper divisors (96452162).

128247742 is a wasteful number, since it uses less digits than its factorization.

128247742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904.

The product of its digits is 50176, while the sum is 37.

The square root of 128247742 is about 11324.6519593319. The cubic root of 128247742 is about 504.2933514155.

The spelling of 128247742 in words is "one hundred twenty-eight million, two hundred forty-seven thousand, seven hundred forty-two".