4197491 has 4 divisors (see below), whose sum is σ = 4201800. Its totient is φ = 4193184.

The previous prime is 4197469. The next prime is 4197511. The reversal of 4197491 is 1947914.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1947914 = 2 ⋅973957.

It is a cyclic number.

It is not a de Polignac number, because 4197491 - 2²² = 3187 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (4197091) 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, 80 + ... + 2898.

It is an arithmetic number, because the mean of its divisors is an integer number (1050450).

Almost surely, 2^4197491 is an apocalyptic number.

4197491 is a deficient number, since it is larger than the sum of its proper divisors (4309).

4197491 is a wasteful number, since it uses less digits than its factorization.

4197491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308.

The product of its digits is 9072, while the sum is 35.

The square root of 4197491 is about 2048.7779284246. Note that the first 3 decimals coincide. The cubic root of 4197491 is about 161.3107304848.

The spelling of 4197491 in words is "four million, one hundred ninety-seven thousand, four hundred ninety-one".