42549473 has 2 divisors, whose sum is σ = 42549474. Its totient is φ = 42549472.

The previous prime is 42549469. The next prime is 42549491. The reversal of 42549473 is 37494524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40043584 + 2505889 = 6328^2 + 1583^2 .

It is a cyclic number.

It is not a de Polignac number, because 42549473 - 2² = 42549469 is a prime.

It is not a weakly prime, because it can be changed into another prime (42549413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21274736 + 21274737.

It is an arithmetic number, because the mean of its divisors is an integer number (21274737).

Almost surely, 2^42549473 is an apocalyptic number.

It is an amenable number.

42549473 is a deficient number, since it is larger than the sum of its proper divisors (1).

42549473 is an equidigital number, since it uses as much as digits as its factorization.

42549473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 38.

The square root of 42549473 is about 6522.9957074951. The cubic root of 42549473 is about 349.1119609696. Note that the first 3 decimals are identical.

The spelling of 42549473 in words is "forty-two million, five hundred forty-nine thousand, four hundred seventy-three".