4127561 has 4 divisors (see below), whose sum is σ = 4150800. Its totient is φ = 4104324.

The previous prime is 4127537. The next prime is 4127573. The reversal of 4127561 is 1657214.

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 4127561 - 2¹⁰ = 4126537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4127561.

It is not an unprimeable number, because it can be changed into a prime (4127521) 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, 11351 + ... + 11708.

It is an arithmetic number, because the mean of its divisors is an integer number (1037700).

Almost surely, 2^4127561 is an apocalyptic number.

It is an amenable number.

4127561 is a deficient number, since it is larger than the sum of its proper divisors (23239).

4127561 is a wasteful number, since it uses less digits than its factorization.

4127561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23238.

The product of its digits is 1680, while the sum is 26.

The square root of 4127561 is about 2031.6399779488. The cubic root of 4127561 is about 160.4098995140.

The spelling of 4127561 in words is "four million, one hundred twenty-seven thousand, five hundred sixty-one".