4197540 has 24 divisors (see below), whose sum is σ = 11753280. Its totient is φ = 1119328.

The previous prime is 4197533. The next prime is 4197541. The reversal of 4197540 is 457914.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 4197498 and 4197507.

It is not an unprimeable number, because it can be changed into a prime (4197541) 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, 34920 + ... + 35039.

It is an arithmetic number, because the mean of its divisors is an integer number (489720).

Almost surely, 2^4197540 is an apocalyptic number.

It is an amenable number.

4197540 is an abundant number, since it is smaller than the sum of its proper divisors (7555740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4197540 is a wasteful number, since it uses less digits than its factorization.

4197540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69971 (or 69969 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 4197540 is about 2048.7898867380. The cubic root of 4197540 is about 161.3113581768.

The spelling of 4197540 in words is "four million, one hundred ninety-seven thousand, five hundred forty".