42451219 has 2 divisors, whose sum is σ = 42451220. Its totient is φ = 42451218.

The previous prime is 42451207. The next prime is 42451229. The reversal of 42451219 is 91215424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42451219 - 2¹¹ = 42449171 is a prime.

It is a super-2 number, since 2×42451219² = 3604211989171922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42451229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21225609 + 21225610.

It is an arithmetic number, because the mean of its divisors is an integer number (21225610).

Almost surely, 2^42451219 is an apocalyptic number.

42451219 is a deficient number, since it is larger than the sum of its proper divisors (1).

42451219 is an equidigital number, since it uses as much as digits as its factorization.

42451219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 42451219 is about 6515.4599991098. The cubic root of 42451219 is about 348.8430341502.

The spelling of 42451219 in words is "forty-two million, four hundred fifty-one thousand, two hundred nineteen".