10409021 has 8 divisors (see below), whose sum is σ = 12139200. Its totient is φ = 8921724.

The previous prime is 10408969. The next prime is 10409033. The reversal of 10409021 is 12090401.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-10409021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10409051) 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, 14831 + ... + 15516.

It is an arithmetic number, because the mean of its divisors is an integer number (1517400).

Almost surely, 2^10409021 is an apocalyptic number.

It is an amenable number.

10409021 is a deficient number, since it is larger than the sum of its proper divisors (1730179).

10409021 is an frugal number, since it uses more digits than its factorization.

10409021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30368 (or 30354 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 10409021 is about 3226.3014428289. The cubic root of 10409021 is about 218.3416702655.

Adding to 10409021 its reverse (12090401), we get a palindrome (22499422).

The spelling of 10409021 in words is "ten million, four hundred nine thousand, twenty-one".