40434521 has 8 divisors (see below), whose sum is σ = 41262984. Its totient is φ = 39611520.

The previous prime is 40434503. The next prime is 40434533. The reversal of 40434521 is 12543404.

It can be written as a sum of positive squares in 4 ways, for example, as 6375625 + 34058896 = 2525^2 + 5836^2 .

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 40434521 - 2¹⁴ = 40418137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40434221) 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, 15701 + ... + 18093.

It is an arithmetic number, because the mean of its divisors is an integer number (5157873).

Almost surely, 2^40434521 is an apocalyptic number.

It is an amenable number.

40434521 is a deficient number, since it is larger than the sum of its proper divisors (828463).

40434521 is a wasteful number, since it uses less digits than its factorization.

40434521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40434521 is about 6358.8144335245. The cubic root of 40434521 is about 343.2290994945.

Adding to 40434521 its reverse (12543404), we get a palindrome (52977925).

The spelling of 40434521 in words is "forty million, four hundred thirty-four thousand, five hundred twenty-one".