42123151 has 4 divisors (see below), whose sum is σ = 48140752. Its totient is φ = 36105552.

The previous prime is 42123149. The next prime is 42123157. The reversal of 42123151 is 15132124.

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

It is not a de Polignac number, because 42123151 - 2¹ = 42123149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42123157) 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, 3008790 + ... + 3008803.

It is an arithmetic number, because the mean of its divisors is an integer number (12035188).

Almost surely, 2^42123151 is an apocalyptic number.

42123151 is a deficient number, since it is larger than the sum of its proper divisors (6017601).

42123151 is an equidigital number, since it uses as much as digits as its factorization.

42123151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6017600.

The product of its digits is 240, while the sum is 19.

The square root of 42123151 is about 6490.2350496727. The cubic root of 42123151 is about 347.9420759495.

Adding to 42123151 its reverse (15132124), we get a palindrome (57255275).

The spelling of 42123151 in words is "forty-two million, one hundred twenty-three thousand, one hundred fifty-one".