42040454 has 4 divisors (see below), whose sum is σ = 63060684. Its totient is φ = 21020226.

The previous prime is 42040451. The next prime is 42040463. The reversal of 42040454 is 45404024.

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

It is a super-2 number, since 2×42040454² = 3534799545052232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510112 + ... + 10510115.

It is an arithmetic number, because the mean of its divisors is an integer number (15765171).

Almost surely, 2^42040454 is an apocalyptic number.

42040454 is a deficient number, since it is larger than the sum of its proper divisors (21020230).

42040454 is a wasteful number, since it uses less digits than its factorization.

42040454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21020229.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 42040454 is about 6483.8610410773. The cubic root of 42040454 is about 347.7142312016.

Adding to 42040454 its reverse (45404024), we get a palindrome (87444478).

The spelling of 42040454 in words is "forty-two million, forty thousand, four hundred fifty-four".