4097621 has 4 divisors (see below), whose sum is σ = 4470144. Its totient is φ = 3725100.

The previous prime is 4097617. The next prime is 4097633. The reversal of 4097621 is 1267904.

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 4097621 - 2² = 4097617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4097021) 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, 186245 + ... + 186266.

It is an arithmetic number, because the mean of its divisors is an integer number (1117536).

Almost surely, 2^4097621 is an apocalyptic number.

It is an amenable number.

4097621 is a deficient number, since it is larger than the sum of its proper divisors (372523).

4097621 is a wasteful number, since it uses less digits than its factorization.

4097621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372522.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 4097621 is about 2024.2581357129. The cubic root of 4097621 is about 160.0211039871.

The spelling of 4097621 in words is "four million, ninety-seven thousand, six hundred twenty-one".