4122561 has 4 divisors (see below), whose sum is σ = 5496752. Its totient is φ = 2748372.

The previous prime is 4122557. The next prime is 4122571. The reversal of 4122561 is 1652214.

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 not a de Polignac number, because 4122561 - 2² = 4122557 is a prime.

It is a super-3 number, since 3×4122561³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4122571) 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, 687091 + ... + 687096.

It is an arithmetic number, because the mean of its divisors is an integer number (1374188).

Almost surely, 2^4122561 is an apocalyptic number.

It is an amenable number.

4122561 is a deficient number, since it is larger than the sum of its proper divisors (1374191).

4122561 is a wasteful number, since it uses less digits than its factorization.

4122561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374190.

The product of its digits is 480, while the sum is 21.

The square root of 4122561 is about 2030.4090720838. The cubic root of 4122561 is about 160.3451014751.

Adding to 4122561 its reverse (1652214), we get a palindrome (5774775).

The spelling of 4122561 in words is "four million, one hundred twenty-two thousand, five hundred sixty-one".