42451235 has 4 divisors (see below), whose sum is σ = 50941488. Its totient is φ = 33960984.

The previous prime is 42451229. The next prime is 42451237. The reversal of 42451235 is 53215424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42451235 - 2⁴ = 42451219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42451237) 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 3 ways as a sum of consecutive naturals, for example, 4245119 + ... + 4245128.

It is an arithmetic number, because the mean of its divisors is an integer number (12735372).

Almost surely, 2^42451235 is an apocalyptic number.

42451235 is a deficient number, since it is larger than the sum of its proper divisors (8490253).

42451235 is an equidigital number, since it uses as much as digits as its factorization.

42451235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8490252.

The product of its digits is 4800, while the sum is 26.

The square root of 42451235 is about 6515.4612269585. The cubic root of 42451235 is about 348.8430779769.

Adding to 42451235 its reverse (53215424), we get a palindrome (95666659).

The spelling of 42451235 in words is "forty-two million, four hundred fifty-one thousand, two hundred thirty-five".