42451043 has 4 divisors (see below), whose sum is σ = 42638280. Its totient is φ = 42263808.

The previous prime is 42451021. The next prime is 42451051. The reversal of 42451043 is 34015424.

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 42451043 - 2⁸ = 42450787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42451943) 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, 93278 + ... + 93731.

It is an arithmetic number, because the mean of its divisors is an integer number (10659570).

Almost surely, 2^42451043 is an apocalyptic number.

42451043 is a deficient number, since it is larger than the sum of its proper divisors (187237).

42451043 is a wasteful number, since it uses less digits than its factorization.

42451043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187236.

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

The square root of 42451043 is about 6515.4464927586. The cubic root of 42451043 is about 348.8425520560.

Adding to 42451043 its reverse (34015424), we get a palindrome (76466467).

The spelling of 42451043 in words is "forty-two million, four hundred fifty-one thousand, forty-three".