42981019 has 4 divisors (see below), whose sum is σ = 43361496. Its totient is φ = 42600544.

The previous prime is 42981017. The next prime is 42981023. The reversal of 42981019 is 91018924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42981019 - 2¹ = 42981017 is a prime.

It is a super-2 number, since 2×42981019² = 3694735988556722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42981017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190069 + ... + 190294.

It is an arithmetic number, because the mean of its divisors is an integer number (10840374).

Almost surely, 2^42981019 is an apocalyptic number.

42981019 is a deficient number, since it is larger than the sum of its proper divisors (380477).

42981019 is a wasteful number, since it uses less digits than its factorization.

42981019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380476.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 42981019 is about 6555.9910768701. The cubic root of 42981019 is about 350.2882496158.

The spelling of 42981019 in words is "forty-two million, nine hundred eighty-one thousand, nineteen".