4207561 has 4 divisors (see below), whose sum is σ = 4246992. Its totient is φ = 4168132.

The previous prime is 4207481. The next prime is 4207571. The reversal of 4207561 is 1657024.

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 4207561 - 2⁷ = 4207433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4207571) 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, 19555 + ... + 19768.

It is an arithmetic number, because the mean of its divisors is an integer number (1061748).

Almost surely, 2^4207561 is an apocalyptic number.

It is an amenable number.

4207561 is a deficient number, since it is larger than the sum of its proper divisors (39431).

4207561 is a wasteful number, since it uses less digits than its factorization.

4207561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39430.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 4207561 is about 2051.2340188287. The cubic root of 4207561 is about 161.4396250854.

The spelling of 4207561 in words is "four million, two hundred seven thousand, five hundred sixty-one".