40542987 has 4 divisors (see below), whose sum is σ = 54057320. Its totient is φ = 27028656.

The previous prime is 40542949. The next prime is 40542989. The reversal of 40542987 is 78924504.

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

It is not a de Polignac number, because 40542987 - 2⁸ = 40542731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40542989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6757162 + ... + 6757167.

It is an arithmetic number, because the mean of its divisors is an integer number (13514330).

Almost surely, 2^40542987 is an apocalyptic number.

40542987 is a deficient number, since it is larger than the sum of its proper divisors (13514333).

40542987 is a wasteful number, since it uses less digits than its factorization.

40542987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13514332.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 40542987 is about 6367.3375126500. The cubic root of 40542987 is about 343.5357306217.

The spelling of 40542987 in words is "forty million, five hundred forty-two thousand, nine hundred eighty-seven".