4078121 has 4 divisors (see below), whose sum is σ = 4107600. Its totient is φ = 4048644.

The previous prime is 4078117. The next prime is 4078133. The reversal of 4078121 is 1218704.

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 a cyclic number.

It is not a de Polignac number, because 4078121 - 2² = 4078117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4077121) 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, 14531 + ... + 14808.

It is an arithmetic number, because the mean of its divisors is an integer number (1026900).

Almost surely, 2^4078121 is an apocalyptic number.

It is an amenable number.

4078121 is a deficient number, since it is larger than the sum of its proper divisors (29479).

4078121 is a wasteful number, since it uses less digits than its factorization.

4078121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29478.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 4078121 is about 2019.4358123001. The cubic root of 4078121 is about 159.7668609746.

The spelling of 4078121 in words is "four million, seventy-eight thousand, one hundred twenty-one".