42123245 has 16 divisors (see below), whose sum is σ = 51746688. Its totient is φ = 32907840.

The previous prime is 42123239. The next prime is 42123259. The reversal of 42123245 is 54232124.

It is a happy number.

It is not a de Polignac number, because 42123245 - 2⁸ = 42122989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42123245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50522 + ... + 51348.

It is an arithmetic number, because the mean of its divisors is an integer number (3234168).

Almost surely, 2^42123245 is an apocalyptic number.

It is an amenable number.

42123245 is a deficient number, since it is larger than the sum of its proper divisors (9623443).

42123245 is a wasteful number, since it uses less digits than its factorization.

42123245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its digits is 1920, while the sum is 23.

The square root of 42123245 is about 6490.2422913170. The cubic root of 42123245 is about 347.9423347663.

Adding to 42123245 its reverse (54232124), we get a palindrome (96355369).

The spelling of 42123245 in words is "forty-two million, one hundred twenty-three thousand, two hundred forty-five".