42056019 has 6 divisors (see below), whose sum is σ = 60747596. Its totient is φ = 28037340.

The previous prime is 42056009. The next prime is 42056041. The reversal of 42056019 is 91065024.

It is not a de Polignac number, because 42056019 - 2¹² = 42051923 is a prime.

It is a super-2 number, since 2×42056019² = 3537417468256722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42055983 and 42056001.

It is not an unprimeable number, because it can be changed into a prime (42056009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2336437 + ... + 2336454.

Almost surely, 2^42056019 is an apocalyptic number.

42056019 is a deficient number, since it is larger than the sum of its proper divisors (18691577).

42056019 is a wasteful number, since it uses less digits than its factorization.

42056019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4672897 (or 4672894 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 42056019 is about 6485.0612179069. The cubic root of 42056019 is about 347.7571383200.

The spelling of 42056019 in words is "forty-two million, fifty-six thousand, nineteen".