42402385 has 8 divisors (see below), whose sum is σ = 51843240. Its totient is φ = 33281664.

The previous prime is 42402377. The next prime is 42402419. The reversal of 42402385 is 58320424.

It can be written as a sum of positive squares in 4 ways, for example, as 22724289 + 19678096 = 4767^2 + 4436^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42402385 - 2³ = 42402377 is a prime.

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, 79740 + ... + 80269.

It is an arithmetic number, because the mean of its divisors is an integer number (6480405).

Almost surely, 2^42402385 is an apocalyptic number.

It is an amenable number.

42402385 is a deficient number, since it is larger than the sum of its proper divisors (9440855).

42402385 is a wasteful number, since it uses less digits than its factorization.

42402385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160067.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 42402385 is about 6511.7113725963. The cubic root of 42402385 is about 348.7092183057.

It can be divided in two parts, 4240 and 2385, that multiplied together give a square (10112400 = 3180²).

The spelling of 42402385 in words is "forty-two million, four hundred two thousand, three hundred eighty-five".