38521087 has 4 divisors (see below), whose sum is σ = 42023016. Its totient is φ = 35019160.

The previous prime is 38521081. The next prime is 38521103. The reversal of 38521087 is 78012583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78012583 = 11 ⋅7092053.

It is a de Polignac number, because none of the positive numbers 2^k-38521087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38521081) 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, 1750948 + ... + 1750969.

It is an arithmetic number, because the mean of its divisors is an integer number (10505754).

Almost surely, 2^38521087 is an apocalyptic number.

38521087 is a deficient number, since it is larger than the sum of its proper divisors (3501929).

38521087 is a wasteful number, since it uses less digits than its factorization.

38521087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501928.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 38521087 is about 6206.5358292690. The cubic root of 38521087 is about 337.7273076868.

It can be divided in two parts, 38 and 521087, that added together give a palindrome (521125).

The spelling of 38521087 in words is "thirty-eight million, five hundred twenty-one thousand, eighty-seven".