40242529 has 4 divisors (see below), whose sum is σ = 41001876. Its totient is φ = 39483184.

The previous prime is 40242511. The next prime is 40242533. The reversal of 40242529 is 92524204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31528225 + 8714304 = 5615^2 + 2952^2 .

It is a cyclic number.

It is not a de Polignac number, because 40242529 - 2⁵ = 40242497 is a prime.

It is a super-2 number, since 2×40242529² = 3238922280631682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40242497 and 40242506.

It is not an unprimeable number, because it can be changed into a prime (40242509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379594 + ... + 379699.

It is an arithmetic number, because the mean of its divisors is an integer number (10250469).

Almost surely, 2^40242529 is an apocalyptic number.

It is an amenable number.

40242529 is a deficient number, since it is larger than the sum of its proper divisors (759347).

40242529 is an equidigital number, since it uses as much as digits as its factorization.

40242529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759346.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 40242529 is about 6343.6999456153. The cubic root of 40242529 is about 342.6849949864.

The spelling of 40242529 in words is "forty million, two hundred forty-two thousand, five hundred twenty-nine".