42248399 has 2 divisors, whose sum is σ = 42248400. Its totient is φ = 42248398.

The previous prime is 42248377. The next prime is 42248449. The reversal of 42248399 is 99384224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42248399 - 2¹⁶ = 42182863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42248329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21124199 + 21124200.

It is an arithmetic number, because the mean of its divisors is an integer number (21124200).

Almost surely, 2^42248399 is an apocalyptic number.

42248399 is a deficient number, since it is larger than the sum of its proper divisors (1).

42248399 is an equidigital number, since it uses as much as digits as its factorization.

42248399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 42248399 is about 6499.8768449871. The cubic root of 42248399 is about 348.2865890181.

The spelling of 42248399 in words is "forty-two million, two hundred forty-eight thousand, three hundred ninety-nine".