40521087 has 8 divisors (see below), whose sum is σ = 60031280. Its totient is φ = 27014040.

The previous prime is 40521037. The next prime is 40521109. The reversal of 40521087 is 78012504.

It is not a de Polignac number, because 40521087 - 2⁷ = 40520959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1500781 = 40521087 / (4 + 0 + 5 + 2 + 1 + 0 + 8 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40521087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750364 + ... + 750417.

It is an arithmetic number, because the mean of its divisors is an integer number (7503910).

Almost surely, 2^40521087 is an apocalyptic number.

40521087 is a deficient number, since it is larger than the sum of its proper divisors (19510193).

40521087 is a wasteful number, since it uses less digits than its factorization.

40521087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500790 (or 1500784 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 40521087 is about 6365.6175662696. The cubic root of 40521087 is about 343.4738638797.

The spelling of 40521087 in words is "forty million, five hundred twenty-one thousand, eighty-seven".