42646123 has 4 divisors (see below), whose sum is σ = 45926608. Its totient is φ = 39365640.

The previous prime is 42646063. The next prime is 42646187. The reversal of 42646123 is 32164624.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42646123 is a prime.

It is a super-2 number, since 2×42646123² = 3637383613862258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42646091 and 42646100.

It is not an unprimeable number, because it can be changed into a prime (42646193) 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, 1640223 + ... + 1640248.

It is an arithmetic number, because the mean of its divisors is an integer number (11481652).

Almost surely, 2^42646123 is an apocalyptic number.

42646123 is a deficient number, since it is larger than the sum of its proper divisors (3280485).

42646123 is a wasteful number, since it uses less digits than its factorization.

42646123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280484.

The product of its digits is 6912, while the sum is 28.

The square root of 42646123 is about 6530.3999111846. The cubic root of 42646123 is about 349.3760939351.

The spelling of 42646123 in words is "forty-two million, six hundred forty-six thousand, one hundred twenty-three".