109406021 has 8 divisors (see below), whose sum is σ = 110275200. Its totient is φ = 108540432.

The previous prime is 109405981. The next prime is 109406027. The reversal of 109406021 is 120604901.

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 109406021 - 2⁶ = 109405957 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 (109406027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99551 + ... + 100643.

It is an arithmetic number, because the mean of its divisors is an integer number (13784400).

Almost surely, 2^109406021 is an apocalyptic number.

It is an amenable number.

109406021 is a deficient number, since it is larger than the sum of its proper divisors (869179).

109406021 is a wasteful number, since it uses less digits than its factorization.

109406021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 109406021 is about 10459.7333139999. The cubic root of 109406021 is about 478.2780036390.

It can be divided in two parts, 10940 and 6021, that added together give a palindrome (16961).

The spelling of 109406021 in words is "one hundred nine million, four hundred six thousand, twenty-one".