40521001 has 8 divisors (see below), whose sum is σ = 41129984. Its totient is φ = 39916800.

The previous prime is 40520993. The next prime is 40521011. The reversal of 40521001 is 10012504.

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 40521001 - 2³ = 40520993 is a prime.

It is a super-3 number, since 3×40521001³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40521011) 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, 18121 + ... + 20233.

It is an arithmetic number, because the mean of its divisors is an integer number (5141248).

Almost surely, 2^40521001 is an apocalyptic number.

It is an amenable number.

40521001 is a deficient number, since it is larger than the sum of its proper divisors (608983).

40521001 is a wasteful number, since it uses less digits than its factorization.

40521001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 40521001 is about 6365.6108112262. The cubic root of 40521001 is about 343.4736208888.

Adding to 40521001 its reverse (10012504), we get a palindrome (50533505).

The spelling of 40521001 in words is "forty million, five hundred twenty-one thousand, one".