40542047 has 16 divisors (see below), whose sum is σ = 51250752. Its totient is φ = 31207680.

The previous prime is 40542043. The next prime is 40542049. The reversal of 40542047 is 74024504.

It is not a de Polignac number, because 40542047 - 2² = 40542043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40542041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2654 + ... + 9387.

It is an arithmetic number, because the mean of its divisors is an integer number (3203172).

Almost surely, 2^40542047 is an apocalyptic number.

40542047 is a deficient number, since it is larger than the sum of its proper divisors (10708705).

40542047 is a wasteful number, since it uses less digits than its factorization.

40542047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12098.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 40542047 is about 6367.2636980103. The cubic root of 40542047 is about 343.5330756119.

The spelling of 40542047 in words is "forty million, five hundred forty-two thousand, forty-seven".