16542197 has 4 divisors (see below), whose sum is σ = 18905376. Its totient is φ = 14179020.

The previous prime is 16542193. The next prime is 16542203. The reversal of 16542197 is 79124561.

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 a cyclic number.

It is not a de Polignac number, because 16542197 - 2² = 16542193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16542191) 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, 1181579 + ... + 1181592.

It is an arithmetic number, because the mean of its divisors is an integer number (4726344).

Almost surely, 2^16542197 is an apocalyptic number.

It is an amenable number.

16542197 is a deficient number, since it is larger than the sum of its proper divisors (2363179).

16542197 is an equidigital number, since it uses as much as digits as its factorization.

16542197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363178.

The product of its digits is 15120, while the sum is 35.

The square root of 16542197 is about 4067.2099773678. The cubic root of 16542197 is about 254.7990060398.

The spelling of 16542197 in words is "sixteen million, five hundred forty-two thousand, one hundred ninety-seven".