42123249 has 12 divisors (see below), whose sum is σ = 69536896. Its totient is φ = 24070392.

The previous prime is 42123239. The next prime is 42123259. The reversal of 42123249 is 94232124.

42123249 is a `hidden beast` number, since 421 + 232 + 4 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (42123239) and next prime (42123259).

It is not a de Polignac number, because 42123249 - 2⁵ = 42123217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42123239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334249 + ... + 334374.

Almost surely, 2^42123249 is an apocalyptic number.

It is an amenable number.

42123249 is a deficient number, since it is larger than the sum of its proper divisors (27413647).

42123249 is a wasteful number, since it uses less digits than its factorization.

42123249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668636 (or 668633 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 42123249 is about 6490.2425994719. The cubic root of 42123249 is about 347.9423457797.

The spelling of 42123249 in words is "forty-two million, one hundred twenty-three thousand, two hundred forty-nine".