4121639 has 8 divisors (see below), whose sum is σ = 4217088. Its totient is φ = 4027320.

The previous prime is 4121629. The next prime is 4121641. The reversal of 4121639 is 9361214.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4121639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121609) 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 7 ways as a sum of consecutive naturals, for example, 15074 + ... + 15344.

It is an arithmetic number, because the mean of its divisors is an integer number (527136).

Almost surely, 2^4121639 is an apocalyptic number.

4121639 is a deficient number, since it is larger than the sum of its proper divisors (95449).

4121639 is a wasteful number, since it uses less digits than its factorization.

4121639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565.

The product of its digits is 1296, while the sum is 26.

The square root of 4121639 is about 2030.1820115448. The cubic root of 4121639 is about 160.3331469961. Note that the first 3 decimals are identical.

The spelling of 4121639 in words is "four million, one hundred twenty-one thousand, six hundred thirty-nine".