4725821 has 2 divisors, whose sum is σ = 4725822. Its totient is φ = 4725820.

The previous prime is 4725781. The next prime is 4725827. The reversal of 4725821 is 1285274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4644025 + 81796 = 2155^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 4725821 - 2⁶ = 4725757 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 4⁹ + 7 + 2¹⁸ + 5⁵ + 8⁴ + 2²² + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4725827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2362910 + 2362911.

It is an arithmetic number, because the mean of its divisors is an integer number (2362911).

Almost surely, 2^4725821 is an apocalyptic number.

It is an amenable number.

4725821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4725821 is an equidigital number, since it uses as much as digits as its factorization.

4725821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 29.

The square root of 4725821 is about 2173.8953516671. The cubic root of 4725821 is about 167.8130597295.

The spelling of 4725821 in words is "four million, seven hundred twenty-five thousand, eight hundred twenty-one".