42290128 has 10 divisors (see below), whose sum is σ = 81937154. Its totient is φ = 21145056.

The previous prime is 42290099. The next prime is 42290153. The reversal of 42290128 is 82109224.

It can be written as a sum of positive squares in only one way, i.e., 41062464 + 1227664 = 6408^2 + 1108^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42290096 and 42290105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321551 + ... + 1321582.

Almost surely, 2^42290128 is an apocalyptic number.

It is an amenable number.

42290128 is a deficient number, since it is larger than the sum of its proper divisors (39647026).

42290128 is a wasteful number, since it uses less digits than its factorization.

42290128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643141 (or 2643135 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 42290128 is about 6503.0860366444. The cubic root of 42290128 is about 348.4012195449.

The spelling of 42290128 in words is "forty-two million, two hundred ninety thousand, one hundred twenty-eight".