4148561 has 4 divisors (see below), whose sum is σ = 4392612. Its totient is φ = 3904512.

The previous prime is 4148489. The next prime is 4148567. The reversal of 4148561 is 1658414.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1488400 + 2660161 = 1220^2 + 1631^2 .

It is a cyclic number.

It is not a de Polignac number, because 4148561 - 2¹⁰ = 4147537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4148567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122000 + ... + 122033.

It is an arithmetic number, because the mean of its divisors is an integer number (1098153).

Almost surely, 2^4148561 is an apocalyptic number.

It is an amenable number.

4148561 is a deficient number, since it is larger than the sum of its proper divisors (244051).

4148561 is a wasteful number, since it uses less digits than its factorization.

4148561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244050.

The product of its digits is 3840, while the sum is 29.

The square root of 4148561 is about 2036.8016594652. The cubic root of 4148561 is about 160.6814812951.

The spelling of 4148561 in words is "four million, one hundred forty-eight thousand, five hundred sixty-one".