42454545 has 32 divisors (see below), whose sum is σ = 79444992. Its totient is φ = 18954432.

The previous prime is 42454523. The next prime is 42454547. The reversal of 42454545 is 54545424.

It is not a de Polignac number, because 42454545 - 2⁹ = 42454033 is a prime.

42454545 is a modest number, since divided by 4545 gives 4245 as remainder.

It is not an unprimeable number, because it can be changed into a prime (42454547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187 + ... + 9216.

It is an arithmetic number, because the mean of its divisors is an integer number (2482656).

Almost surely, 2^42454545 is an apocalyptic number.

It is an amenable number.

42454545 is a deficient number, since it is larger than the sum of its proper divisors (36990447).

42454545 is a wasteful number, since it uses less digits than its factorization.

42454545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461.

The product of its digits is 64000, while the sum is 33.

The square root of 42454545 is about 6515.7152331881. The cubic root of 42454545 is about 348.8521443843.

Adding to 42454545 its reverse (54545424), we get a palindrome (96999969).

The spelling of 42454545 in words is "forty-two million, four hundred fifty-four thousand, five hundred forty-five".