40542473 has 2 divisors, whose sum is σ = 40542474. Its totient is φ = 40542472.

The previous prime is 40542461. The next prime is 40542503. The reversal of 40542473 is 37424504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40284409 + 258064 = 6347^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 40542473 - 2⁴ = 40542457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40542373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20271236 + 20271237.

It is an arithmetic number, because the mean of its divisors is an integer number (20271237).

Almost surely, 2^40542473 is an apocalyptic number.

It is an amenable number.

40542473 is a deficient number, since it is larger than the sum of its proper divisors (1).

40542473 is an equidigital number, since it uses as much as digits as its factorization.

40542473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 40542473 is about 6367.2971502828. The cubic root of 40542473 is about 343.5342788448.

Adding to 40542473 its reverse (37424504), we get a palindrome (77966977).

The spelling of 40542473 in words is "forty million, five hundred forty-two thousand, four hundred seventy-three".