42051619 has 2 divisors, whose sum is σ = 42051620. Its totient is φ = 42051618.

The previous prime is 42051589. The next prime is 42051671. The reversal of 42051619 is 91615024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42051619 - 2⁵ = 42051587 is a prime.

It is a super-2 number, since 2×42051619² = 3536677321042322, which contains 22 as substring.

It is equal to p_2550556 and since 42051619 and 2550556 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42051689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21025809 + 21025810.

It is an arithmetic number, because the mean of its divisors is an integer number (21025810).

Almost surely, 2^42051619 is an apocalyptic number.

42051619 is a deficient number, since it is larger than the sum of its proper divisors (1).

42051619 is an equidigital number, since it uses as much as digits as its factorization.

42051619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 42051619 is about 6484.7219678256. The cubic root of 42051619 is about 347.7450101728.

The spelling of 42051619 in words is "forty-two million, fifty-one thousand, six hundred nineteen".