16021401 has 8 divisors (see below), whose sum is σ = 23303904. Its totient is φ = 9709920.

The previous prime is 16021399. The next prime is 16021417. The reversal of 16021401 is 10412061.

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

It is not a de Polignac number, because 16021401 - 2¹ = 16021399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16021301) 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, 242716 + ... + 242781.

It is an arithmetic number, because the mean of its divisors is an integer number (2912988).

Almost surely, 2^16021401 is an apocalyptic number.

16021401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16021401 is a deficient number, since it is larger than the sum of its proper divisors (7282503).

16021401 is a wasteful number, since it uses less digits than its factorization.

16021401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485511.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 16021401 is about 4002.6742310610. The cubic root of 16021401 is about 252.0965081352.

Adding to 16021401 its reverse (10412061), we get a palindrome (26433462).

It can be divided in two parts, 1602 and 1401, that added together give a palindrome (3003).

The spelling of 16021401 in words is "sixteen million, twenty-one thousand, four hundred one".