16261403 has 8 divisors (see below), whose sum is σ = 16604160. Its totient is φ = 15921000.

The previous prime is 16261393. The next prime is 16261409. The reversal of 16261403 is 30416261.

It is a happy number.

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 16261403 - 2⁴ = 16261387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16261409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21278 + ... + 22028.

It is an arithmetic number, because the mean of its divisors is an integer number (2075520).

Almost surely, 2^16261403 is an apocalyptic number.

16261403 is a deficient number, since it is larger than the sum of its proper divisors (342757).

16261403 is an equidigital number, since it uses as much as digits as its factorization.

16261403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 16261403 is about 4032.5429941911. The cubic root of 16261403 is about 253.3490835468.

Adding to 16261403 its reverse (30416261), we get a palindrome (46677664).

The spelling of 16261403 in words is "sixteen million, two hundred sixty-one thousand, four hundred three".