40921187 has 8 divisors (see below), whose sum is σ = 41481072. Its totient is φ = 40364800.

The previous prime is 40921171. The next prime is 40921189. The reversal of 40921187 is 78112904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40921187 - 2⁴ = 40921171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40921189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29387 + ... + 30747.

It is an arithmetic number, because the mean of its divisors is an integer number (5185134).

Almost surely, 2^40921187 is an apocalyptic number.

40921187 is a deficient number, since it is larger than the sum of its proper divisors (559885).

40921187 is a wasteful number, since it uses less digits than its factorization.

40921187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 40921187 is about 6396.9670157036. The cubic root of 40921187 is about 344.6006356917.

The spelling of 40921187 in words is "forty million, nine hundred twenty-one thousand, one hundred eighty-seven".