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385621 is a prime number
BaseRepresentation
bin1011110001001010101
3201120222021
41132021111
544314441
612133141
73164155
oct1361125
9646867
10385621
112437a5
121671b1
131066a2
14a0765
15793d1
hex5e255

385621 has 2 divisors, whose sum is σ = 385622. Its totient is φ = 385620.

The previous prime is 385607. The next prime is 385631. The reversal of 385621 is 126583.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378225 + 7396 = 615^2 + 86^2 .

It is an emirp because it is prime and its reverse (126583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385621 - 25 = 385589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192810 + 192811.

It is an arithmetic number, because the mean of its divisors is an integer number (192811).

2385621 is an apocalyptic number.

It is an amenable number.

385621 is a deficient number, since it is larger than the sum of its proper divisors (1).

385621 is an equidigital number, since it uses as much as digits as its factorization.

385621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 385621 is about 620.9838967316. The cubic root of 385621 is about 72.7869562631.

The spelling of 385621 in words is "three hundred eighty-five thousand, six hundred twenty-one".