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30425 = 521217
BaseRepresentation
bin111011011011001
31112201212
413123121
51433200
6352505
7154463
oct73331
945655
1030425
112094a
1215735
1310b05
14b133
159035
hex76d9

30425 has 6 divisors (see below), whose sum is σ = 37758. Its totient is φ = 24320.

The previous prime is 30403. The next prime is 30427. The reversal of 30425 is 52403.

It can be written as a sum of positive squares in 3 ways, for example, as 841 + 29584 = 29^2 + 172^2 .

It is not a de Polignac number, because 30425 - 28 = 30169 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 584 + ... + 633.

It is an arithmetic number, because the mean of its divisors is an integer number (6293).

230425 is an apocalyptic number.

It is an amenable number.

30425 is a deficient number, since it is larger than the sum of its proper divisors (7333).

30425 is a wasteful number, since it uses less digits than its factorization.

30425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 30425 is about 174.4276354251. The cubic root of 30425 is about 31.2183679921.

Adding to 30425 its reverse (52403), we get a palindrome (82828).

The spelling of 30425 in words is "thirty thousand, four hundred twenty-five".

Divisors: 1 5 25 1217 6085 30425