42456451 has 4 divisors (see below), whose sum is σ = 42670000. Its totient is φ = 42242904.

The previous prime is 42456439. The next prime is 42456457. The reversal of 42456451 is 15465424.

It is a happy number.

42456451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42456451 - 2¹⁵ = 42423683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42456457) 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 3 ways as a sum of consecutive naturals, for example, 106476 + ... + 106873.

It is an arithmetic number, because the mean of its divisors is an integer number (10667500).

Almost surely, 2^42456451 is an apocalyptic number.

42456451 is a deficient number, since it is larger than the sum of its proper divisors (213549).

42456451 is a wasteful number, since it uses less digits than its factorization.

42456451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213548.

The product of its digits is 19200, while the sum is 31.

The square root of 42456451 is about 6515.8614933100. The cubic root of 42456451 is about 348.8573648873.

The spelling of 42456451 in words is "forty-two million, four hundred fifty-six thousand, four hundred fifty-one".