16401235 has 8 divisors (see below), whose sum is σ = 19782576. Its totient is φ = 13053600.

The previous prime is 16401197. The next prime is 16401239. The reversal of 16401235 is 53210461.

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

It is not a de Polignac number, because 16401235 - 2⁹ = 16400723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16401239) 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, 7341 + ... + 9310.

It is an arithmetic number, because the mean of its divisors is an integer number (2472822).

Almost surely, 2^16401235 is an apocalyptic number.

16401235 is a deficient number, since it is larger than the sum of its proper divisors (3381341).

16401235 is a wasteful number, since it uses less digits than its factorization.

16401235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16853.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 16401235 is about 4049.8438241493. The cubic root of 16401235 is about 254.0731958847.

Adding to 16401235 its reverse (53210461), we get a palindrome (69611696).

The spelling of 16401235 in words is "sixteen million, four hundred one thousand, two hundred thirty-five".