4912921 has 8 divisors (see below), whose sum is σ = 5312384. Its totient is φ = 4516560.

The previous prime is 4912903. The next prime is 4912937. The reversal of 4912921 is 1292194.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4912921 - 2¹⁵ = 4880153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4912921.

It is not an unprimeable number, because it can be changed into a prime (4912951) 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, 3376 + ... + 4606.

It is an arithmetic number, because the mean of its divisors is an integer number (664048).

Almost surely, 2^4912921 is an apocalyptic number.

It is an amenable number.

4912921 is a deficient number, since it is larger than the sum of its proper divisors (399463).

4912921 is a wasteful number, since it uses less digits than its factorization.

4912921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551.

The product of its digits is 1296, while the sum is 28.

The square root of 4912921 is about 2216.5109970402. The cubic root of 4912921 is about 169.9990888071. Note that the first 3 decimals are identical.

The spelling of 4912921 in words is "four million, nine hundred twelve thousand, nine hundred twenty-one".