40252521 has 8 divisors (see below), whose sum is σ = 54145440. Its totient is φ = 26597312.

The previous prime is 40252519. The next prime is 40252547. The reversal of 40252521 is 12525204.

It is a happy number.

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 40252521 - 2¹ = 40252519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40252561) 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, 59031 + ... + 59708.

It is an arithmetic number, because the mean of its divisors is an integer number (6768180).

Almost surely, 2^40252521 is an apocalyptic number.

It is an amenable number.

40252521 is a deficient number, since it is larger than the sum of its proper divisors (13892919).

40252521 is a wasteful number, since it uses less digits than its factorization.

40252521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118855.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 40252521 is about 6344.4874497472. The cubic root of 40252521 is about 342.7133549098.

Adding to 40252521 its reverse (12525204), we get a palindrome (52777725).

The spelling of 40252521 in words is "forty million, two hundred fifty-two thousand, five hundred twenty-one".