16442401 has 4 divisors (see below), whose sum is σ = 17157312. Its totient is φ = 15727492.

The previous prime is 16442399. The next prime is 16442407. The reversal of 16442401 is 10424461.

16442401 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10424461 = 173 ⋅60257.

It is not a de Polignac number, because 16442401 - 2¹ = 16442399 is a prime.

It is a super-3 number, since 3×16442401³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442407) 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, 357421 + ... + 357466.

It is an arithmetic number, because the mean of its divisors is an integer number (4289328).

Almost surely, 2^16442401 is an apocalyptic number.

It is an amenable number.

16442401 is a deficient number, since it is larger than the sum of its proper divisors (714911).

16442401 is an equidigital number, since it uses as much as digits as its factorization.

16442401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714910.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 16442401 is about 4054.9230572232. The cubic root of 16442401 is about 254.2855871823.

Adding to 16442401 its reverse (10424461), we get a palindrome (26866862).

The spelling of 16442401 in words is "sixteen million, four hundred forty-two thousand, four hundred one".