42320415 has 16 divisors (see below), whose sum is σ = 69543648. Its totient is φ = 21960576.

The previous prime is 42320401. The next prime is 42320419. The reversal of 42320415 is 51402324.

It is not a de Polignac number, because 42320415 - 2¹⁹ = 41796127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42320391 and 42320400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42320419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37572 + ... + 38681.

It is an arithmetic number, because the mean of its divisors is an integer number (4346478).

Almost surely, 2^42320415 is an apocalyptic number.

42320415 is a deficient number, since it is larger than the sum of its proper divisors (27223233).

42320415 is a wasteful number, since it uses less digits than its factorization.

42320415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76298.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42320415 is about 6505.4142835026. The cubic root of 42320415 is about 348.4843714152.

Adding to 42320415 its reverse (51402324), we get a palindrome (93722739).

The spelling of 42320415 in words is "forty-two million, three hundred twenty thousand, four hundred fifteen".