40470521 has 12 divisors (see below), whose sum is σ = 50700132. Its totient is φ = 32020128.

The previous prime is 40470517. The next prime is 40470527. The reversal of 40470521 is 12507404.

It can be written as a sum of positive squares in 2 ways, for example, as 14714896 + 25755625 = 3836^2 + 5075^2 .

It is not a de Polignac number, because 40470521 - 2² = 40470517 is a prime.

It is a super-2 number, since 2×40470521² = 3275726140022882, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40470527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31130 + ... + 32403.

It is an arithmetic number, because the mean of its divisors is an integer number (4225011).

Almost surely, 2^40470521 is an apocalyptic number.

It is an amenable number.

40470521 is a deficient number, since it is larger than the sum of its proper divisors (10229611).

40470521 is a wasteful number, since it uses less digits than its factorization.

40470521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63560 (or 63553 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 40470521 is about 6361.6445200907. The cubic root of 40470521 is about 343.3309314774.

Adding to 40470521 its reverse (12507404), we get a palindrome (52977925).

The spelling of 40470521 in words is "forty million, four hundred seventy thousand, five hundred twenty-one".