8735621 has 2 divisors, whose sum is σ = 8735622. Its totient is φ = 8735620.

The previous prime is 8735609. The next prime is 8735633. The reversal of 8735621 is 1265378.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (8735609) and next prime (8735633).

It can be written as a sum of positive squares in only one way, i.e., 5808100 + 2927521 = 2410^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 8735621 - 2⁶ = 8735557 is a prime.

It is a super-2 number, since 2×8735621² = 152622148511282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8735681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4367810 + 4367811.

It is an arithmetic number, because the mean of its divisors is an integer number (4367811).

Almost surely, 2^8735621 is an apocalyptic number.

It is an amenable number.

8735621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8735621 is an equidigital number, since it uses as much as digits as its factorization.

8735621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 8735621 is about 2955.6083976062. The cubic root of 8735621 is about 205.9513269868.

The spelling of 8735621 in words is "eight million, seven hundred thirty-five thousand, six hundred twenty-one".