42455399 has 16 divisors (see below), whose sum is σ = 50411520. Its totient is φ = 34987680.

The previous prime is 42455389. The next prime is 42455423. The reversal of 42455399 is 99355424.

It is not a de Polignac number, because 42455399 - 2⁴ = 42455383 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42455359) 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, 38297 + ... + 39389.

It is an arithmetic number, because the mean of its divisors is an integer number (3150720).

Almost surely, 2^42455399 is an apocalyptic number.

42455399 is a deficient number, since it is larger than the sum of its proper divisors (7956121).

42455399 is a wasteful number, since it uses less digits than its factorization.

42455399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310.

The product of its digits is 194400, while the sum is 41.

The square root of 42455399 is about 6515.7807667232. The cubic root of 42455399 is about 348.8544834958.

The spelling of 42455399 in words is "forty-two million, four hundred fifty-five thousand, three hundred ninety-nine".