16340621 has 8 divisors (see below), whose sum is σ = 18874944. Its totient is φ = 13981120.

The previous prime is 16340617. The next prime is 16340629. The reversal of 16340621 is 12604361.

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 16340621 - 2² = 16340617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16340629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43505 + ... + 43878.

It is an arithmetic number, because the mean of its divisors is an integer number (2359368).

Almost surely, 2^16340621 is an apocalyptic number.

16340621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16340621 is a deficient number, since it is larger than the sum of its proper divisors (2534323).

16340621 is a wasteful number, since it uses less digits than its factorization.

16340621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87411.

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

The square root of 16340621 is about 4042.3533987023. The cubic root of 16340621 is about 253.7598169740.

Adding to 16340621 its reverse (12604361), we get a palindrome (28944982).

It can be divided in two parts, 16340 and 621, that added together give a palindrome (16961).

The spelling of 16340621 in words is "sixteen million, three hundred forty thousand, six hundred twenty-one".