4121649 has 12 divisors (see below), whose sum is σ = 6804096. Its totient is φ = 2355192.

The previous prime is 4121647. The next prime is 4121657. The reversal of 4121649 is 9461214.

4121649 is a `hidden beast` number, since 4 + 12 + 1 + 649 = 666.

It is not a de Polignac number, because 4121649 - 2¹ = 4121647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4121641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32649 + ... + 32774.

It is an arithmetic number, because the mean of its divisors is an integer number (567008).

Almost surely, 2^4121649 is an apocalyptic number.

It is an amenable number.

4121649 is a deficient number, since it is larger than the sum of its proper divisors (2682447).

4121649 is a wasteful number, since it uses less digits than its factorization.

4121649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65436 (or 65433 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 4121649 is about 2030.1844743767. The cubic root of 4121649 is about 160.3332766638. Note that the first 3 decimals are identical.

It can be divided in two parts, 412164 and 9, that multiplied together give a square (3709476 = 1926²).

The spelling of 4121649 in words is "four million, one hundred twenty-one thousand, six hundred forty-nine".