4751921 has 4 divisors (see below), whose sum is σ = 4776000. Its totient is φ = 4727844.

The previous prime is 4751917. The next prime is 4751951. The reversal of 4751921 is 1291574.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1291574 = 2 ⋅645787.

It is a cyclic number.

It is not a de Polignac number, because 4751921 - 2² = 4751917 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4751951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11741 + ... + 12138.

It is an arithmetic number, because the mean of its divisors is an integer number (1194000).

Almost surely, 2^4751921 is an apocalyptic number.

It is an amenable number.

4751921 is a deficient number, since it is larger than the sum of its proper divisors (24079).

4751921 is a wasteful number, since it uses less digits than its factorization.

4751921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24078.

The product of its digits is 2520, while the sum is 29.

The square root of 4751921 is about 2179.8901348462. The cubic root of 4751921 is about 168.1214281797.

The spelling of 4751921 in words is "four million, seven hundred fifty-one thousand, nine hundred twenty-one".