40122987 has 4 divisors (see below), whose sum is σ = 53497320. Its totient is φ = 26748656.

The previous prime is 40122923. The next prime is 40123001. The reversal of 40122987 is 78922104.

It is a happy number.

40122987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40122987 - 2⁶ = 40122923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40122487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6687162 + ... + 6687167.

It is an arithmetic number, because the mean of its divisors is an integer number (13374330).

Almost surely, 2^40122987 is an apocalyptic number.

40122987 is a deficient number, since it is larger than the sum of its proper divisors (13374333).

40122987 is a wasteful number, since it uses less digits than its factorization.

40122987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13374332.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 40122987 is about 6334.2708341213. The cubic root of 40122987 is about 342.3453387346.

The spelling of 40122987 in words is "forty million, one hundred twenty-two thousand, nine hundred eighty-seven".