16126021 has 8 divisors (see below), whose sum is σ = 16498944. Its totient is φ = 15756720.

The previous prime is 16125971. The next prime is 16126037. The reversal of 16126021 is 12062161.

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 16126021 - 2¹⁷ = 15994949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16126021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16126051) 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, 9396 + ... + 10978.

It is an arithmetic number, because the mean of its divisors is an integer number (2062368).

Almost surely, 2^16126021 is an apocalyptic number.

It is an amenable number.

16126021 is a deficient number, since it is larger than the sum of its proper divisors (372923).

16126021 is a wasteful number, since it uses less digits than its factorization.

16126021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 16126021 is about 4015.7217284070. The cubic root of 16126021 is about 252.6440494263.

Adding to 16126021 its reverse (12062161), we get a palindrome (28188182).

The spelling of 16126021 in words is "sixteen million, one hundred twenty-six thousand, twenty-one".