42248449 has 2 divisors, whose sum is σ = 42248450. Its totient is φ = 42248448.

The previous prime is 42248399. The next prime is 42248483. The reversal of 42248449 is 94484224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40640625 + 1607824 = 6375^2 + 1268^2 .

It is a cyclic number.

It is not a de Polignac number, because 42248449 - 2⁷ = 42248321 is a prime.

It is not a weakly prime, because it can be changed into another prime (42248249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21124224 + 21124225.

It is an arithmetic number, because the mean of its divisors is an integer number (21124225).

Almost surely, 2^42248449 is an apocalyptic number.

It is an amenable number.

42248449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42248449 is an equidigital number, since it uses as much as digits as its factorization.

42248449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 37.

The square root of 42248449 is about 6499.8806912127. The cubic root of 42248449 is about 348.2867264144.

It can be divided in two parts, 4224 and 8449, that multiplied together give a triangular number (35688576 = T₈₄₄₈).

The spelling of 42248449 in words is "forty-two million, two hundred forty-eight thousand, four hundred forty-nine".