4821157 has 4 divisors (see below), whose sum is σ = 5259456. Its totient is φ = 4382860.

The previous prime is 4821143. The next prime is 4821161. The reversal of 4821157 is 7511284.

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 4821157 - 2⁷ = 4821029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4821127) 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, 219133 + ... + 219154.

It is an arithmetic number, because the mean of its divisors is an integer number (1314864).

Almost surely, 2^4821157 is an apocalyptic number.

It is an amenable number.

4821157 is a deficient number, since it is larger than the sum of its proper divisors (438299).

4821157 is a wasteful number, since it uses less digits than its factorization.

4821157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438298.

The product of its digits is 2240, while the sum is 28.

The square root of 4821157 is about 2195.7133237288. The cubic root of 4821157 is about 168.9340101593.

The spelling of 4821157 in words is "four million, eight hundred twenty-one thousand, one hundred fifty-seven".