16420001 has 4 divisors (see below), whose sum is σ = 17683092. Its totient is φ = 15156912.

The previous prime is 16419989. The next prime is 16420007. The reversal of 16420001 is 10002461.

16420001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10002461 = 7 ⋅1428923.

It can be written as a sum of positive squares in 2 ways, for example, as 2907025 + 13512976 = 1705^2 + 3676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16420001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16420007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631526 + ... + 631551.

It is an arithmetic number, because the mean of its divisors is an integer number (4420773).

Almost surely, 2^16420001 is an apocalyptic number.

It is an amenable number.

16420001 is a deficient number, since it is larger than the sum of its proper divisors (1263091).

16420001 is a wasteful number, since it uses less digits than its factorization.

16420001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263090.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 16420001 is about 4052.1600412619. The cubic root of 16420001 is about 254.1700609538.

Adding to 16420001 its reverse (10002461), we get a palindrome (26422462).

The spelling of 16420001 in words is "sixteen million, four hundred twenty thousand, one".