42006455 has 4 divisors (see below), whose sum is σ = 50407752. Its totient is φ = 33605160.

The previous prime is 42006443. The next prime is 42006469. The reversal of 42006455 is 55460024.

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

It is not a de Polignac number, because 42006455 - 2⁸ = 42006199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4200641 + ... + 4200650.

It is an arithmetic number, because the mean of its divisors is an integer number (12601938).

Almost surely, 2^42006455 is an apocalyptic number.

42006455 is a deficient number, since it is larger than the sum of its proper divisors (8401297).

42006455 is an equidigital number, since it uses as much as digits as its factorization.

42006455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8401296.

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

The square root of 42006455 is about 6481.2386933363. The cubic root of 42006455 is about 347.6204713161.

Adding to 42006455 its reverse (55460024), we get a palindrome (97466479).

The spelling of 42006455 in words is "forty-two million, six thousand, four hundred fifty-five".