40234521 has 16 divisors (see below), whose sum is σ = 56125440. Its totient is φ = 25589520.

The previous prime is 40234511. The next prime is 40234543. The reversal of 40234521 is 12543204.

It is not a de Polignac number, because 40234521 - 2¹¹ = 40232473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40234501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49206 + ... + 50016.

It is an arithmetic number, because the mean of its divisors is an integer number (3507840).

Almost surely, 2^40234521 is an apocalyptic number.

It is an amenable number.

40234521 is a deficient number, since it is larger than the sum of its proper divisors (15890919).

40234521 is a wasteful number, since it uses less digits than its factorization.

40234521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40234521 is about 6343.0687368182. The cubic root of 40234521 is about 342.6622627878.

Adding to 40234521 its reverse (12543204), we get a palindrome (52777725).

It can be divided in two parts, 40234 and 521, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 40234521 in words is "forty million, two hundred thirty-four thousand, five hundred twenty-one".