42402419 has 2 divisors, whose sum is σ = 42402420. Its totient is φ = 42402418.

The previous prime is 42402377. The next prime is 42402421. The reversal of 42402419 is 91420424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42402419 - 2⁸ = 42402163 is a prime.

It is a super-2 number, since 2×42402419² = 3595930274103122, which contains 22 as substring.

Together with 42402421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42402499) 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, 21201209 + 21201210.

It is an arithmetic number, because the mean of its divisors is an integer number (21201210).

Almost surely, 2^42402419 is an apocalyptic number.

42402419 is a deficient number, since it is larger than the sum of its proper divisors (1).

42402419 is an equidigital number, since it uses as much as digits as its factorization.

42402419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 42402419 is about 6511.7139832766. The cubic root of 42402419 is about 348.7093115089.

The spelling of 42402419 in words is "forty-two million, four hundred two thousand, four hundred nineteen".