4125561 has 8 divisors (see below), whose sum is σ = 6000864. Its totient is φ = 2500320.

The previous prime is 4125559. The next prime is 4125571. The reversal of 4125561 is 1655214.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4125561 - 2¹ = 4125559 is a prime.

4125561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4125521) 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, 62476 + ... + 62541.

It is an arithmetic number, because the mean of its divisors is an integer number (750108).

Almost surely, 2^4125561 is an apocalyptic number.

It is an amenable number.

4125561 is a deficient number, since it is larger than the sum of its proper divisors (1875303).

4125561 is a wasteful number, since it uses less digits than its factorization.

4125561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125031.

The product of its digits is 1200, while the sum is 24.

The square root of 4125561 is about 2031.1477051165. The cubic root of 4125561 is about 160.3839865814.

The spelling of 4125561 in words is "four million, one hundred twenty-five thousand, five hundred sixty-one".