40998921 has 8 divisors (see below), whose sum is σ = 54695520. Its totient is φ = 27317472.

The previous prime is 40998911. The next prime is 40998959. The reversal of 40998921 is 12989904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40998921 - 2²¹ = 38901769 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (40998911) 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, 6606 + ... + 11208.

It is an arithmetic number, because the mean of its divisors is an integer number (6836940).

Almost surely, 2^40998921 is an apocalyptic number.

It is an amenable number.

40998921 is a deficient number, since it is larger than the sum of its proper divisors (13696599).

40998921 is a wasteful number, since it uses less digits than its factorization.

40998921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7575.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 40998921 is about 6403.0399811340. The cubic root of 40998921 is about 344.8186991122.

The spelling of 40998921 in words is "forty million, nine hundred ninety-eight thousand, nine hundred twenty-one".