4154921 has 4 divisors (see below), whose sum is σ = 4176000. Its totient is φ = 4133844.

The previous prime is 4154911. The next prime is 4154923. The reversal of 4154921 is 1294514.

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 a de Polignac number, because none of the positive numbers 2^k-4154921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4154923) 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, 10241 + ... + 10638.

It is an arithmetic number, because the mean of its divisors is an integer number (1044000).

Almost surely, 2^4154921 is an apocalyptic number.

It is an amenable number.

4154921 is a deficient number, since it is larger than the sum of its proper divisors (21079).

4154921 is a wasteful number, since it uses less digits than its factorization.

4154921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21078.

The product of its digits is 1440, while the sum is 26.

The square root of 4154921 is about 2038.3623328545. The cubic root of 4154921 is about 160.7635509120.

The spelling of 4154921 in words is "four million, one hundred fifty-four thousand, nine hundred twenty-one".