40912591 has 16 divisors (see below), whose sum is σ = 46275840. Its totient is φ = 35965440.

The previous prime is 40912589. The next prime is 40912603. The reversal of 40912591 is 19521904.

40912591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40912591 - 2¹ = 40912589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40912541) 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 15 ways as a sum of consecutive naturals, for example, 13945 + ... + 16621.

It is an arithmetic number, because the mean of its divisors is an integer number (2892240).

Almost surely, 2^40912591 is an apocalyptic number.

40912591 is a deficient number, since it is larger than the sum of its proper divisors (5363249).

40912591 is a wasteful number, since it uses less digits than its factorization.

40912591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 40912591 is about 6396.2950995088. The cubic root of 40912591 is about 344.5765047975.

The spelling of 40912591 in words is "forty million, nine hundred twelve thousand, five hundred ninety-one".