42123495 has 16 divisors (see below), whose sum is σ = 67478112. Its totient is φ = 22439040.

The previous prime is 42123493. The next prime is 42123509. The reversal of 42123495 is 59432124.

It is not a de Polignac number, because 42123495 - 2¹ = 42123493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42123493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23325 + ... + 25065.

It is an arithmetic number, because the mean of its divisors is an integer number (4217382).

Almost surely, 2^42123495 is an apocalyptic number.

42123495 is a deficient number, since it is larger than the sum of its proper divisors (25354617).

42123495 is a wasteful number, since it uses less digits than its factorization.

42123495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362.

The product of its digits is 8640, while the sum is 30.

The square root of 42123495 is about 6490.2615509700. The cubic root of 42123495 is about 347.9430231068.

The spelling of 42123495 in words is "forty-two million, one hundred twenty-three thousand, four hundred ninety-five".