42994123 has 4 divisors (see below), whose sum is σ = 43122040. Its totient is φ = 42866208.

The previous prime is 42994087. The next prime is 42994129. The reversal of 42994123 is 32149924.

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 42994123 - 2⁹ = 42993611 is a prime.

It is a super-2 number, since 2×42994123² = 3696989225078258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42994129) 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, 63453 + ... + 64126.

It is an arithmetic number, because the mean of its divisors is an integer number (10780510).

Almost surely, 2^42994123 is an apocalyptic number.

42994123 is a deficient number, since it is larger than the sum of its proper divisors (127917).

42994123 is a wasteful number, since it uses less digits than its factorization.

42994123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127916.

The product of its digits is 15552, while the sum is 34.

The square root of 42994123 is about 6556.9903919405. The cubic root of 42994123 is about 350.3238444817.

The spelling of 42994123 in words is "forty-two million, nine hundred ninety-four thousand, one hundred twenty-three".