42521451 has 8 divisors (see below), whose sum is σ = 64794624. Its totient is φ = 24297960.

The previous prime is 42521443. The next prime is 42521459. The reversal of 42521451 is 15412524.

42521451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42521443) and next prime (42521459).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42521451 - 2³ = 42521443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42521459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012395 + ... + 1012436.

It is an arithmetic number, because the mean of its divisors is an integer number (8099328).

Almost surely, 2^42521451 is an apocalyptic number.

42521451 is a deficient number, since it is larger than the sum of its proper divisors (22273173).

42521451 is a wasteful number, since it uses less digits than its factorization.

42521451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024841.

The product of its digits is 1600, while the sum is 24.

The square root of 42521451 is about 6520.8474142553. The cubic root of 42521451 is about 349.0353053886.

Adding to 42521451 its reverse (15412524), we get a palindrome (57933975).

The spelling of 42521451 in words is "forty-two million, five hundred twenty-one thousand, four hundred fifty-one".