16142621 has 4 divisors (see below), whose sum is σ = 17610144. Its totient is φ = 14675100.

The previous prime is 16142617. The next prime is 16142629. The reversal of 16142621 is 12624161.

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.

It is not a de Polignac number, because 16142621 - 2² = 16142617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16142629) 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 3 ways as a sum of consecutive naturals, for example, 733745 + ... + 733766.

It is an arithmetic number, because the mean of its divisors is an integer number (4402536).

Almost surely, 2^16142621 is an apocalyptic number.

16142621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16142621 is a deficient number, since it is larger than the sum of its proper divisors (1467523).

16142621 is a wasteful number, since it uses less digits than its factorization.

16142621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467522.

The product of its digits is 576, while the sum is 23.

The square root of 16142621 is about 4017.7880730571. The cubic root of 16142621 is about 252.7307096340.

Adding to 16142621 its reverse (12624161), we get a palindrome (28766782).

The spelling of 16142621 in words is "sixteen million, one hundred forty-two thousand, six hundred twenty-one".