42645455 has 4 divisors (see below), whose sum is σ = 51174552. Its totient is φ = 34116360.

The previous prime is 42645437. The next prime is 42645467. The reversal of 42645455 is 55454624.

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

It is not a de Polignac number, because 42645455 - 2⁸ = 42645199 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, 4264541 + ... + 4264550.

It is an arithmetic number, because the mean of its divisors is an integer number (12793638).

Almost surely, 2^42645455 is an apocalyptic number.

42645455 is a deficient number, since it is larger than the sum of its proper divisors (8529097).

42645455 is an equidigital number, since it uses as much as digits as its factorization.

42645455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8529096.

The product of its digits is 96000, while the sum is 35.

The square root of 42645455 is about 6530.3487655714. The cubic root of 42645455 is about 349.3742697407.

The spelling of 42645455 in words is "forty-two million, six hundred forty-five thousand, four hundred fifty-five".