4121851 has 4 divisors (see below), whose sum is σ = 4217752. Its totient is φ = 4025952.

The previous prime is 4121849. The next prime is 4121861. The reversal of 4121851 is 1581214.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1581214 = 2 ⋅790607.

It is a cyclic number.

It is not a de Polignac number, because 4121851 - 2¹ = 4121849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4121861) 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, 47886 + ... + 47971.

It is an arithmetic number, because the mean of its divisors is an integer number (1054438).

Almost surely, 2^4121851 is an apocalyptic number.

4121851 is a deficient number, since it is larger than the sum of its proper divisors (95901).

4121851 is an equidigital number, since it uses as much as digits as its factorization.

4121851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95900.

The product of its digits is 320, while the sum is 22.

The square root of 4121851 is about 2030.2342229408. The cubic root of 4121851 is about 160.3358959062.

The spelling of 4121851 in words is "four million, one hundred twenty-one thousand, eight hundred fifty-one".