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25390 = 252539
BaseRepresentation
bin110001100101110
31021211101
412030232
51303030
6313314
7134011
oct61456
937741
1025390
1118092
121283a
13b731
149378
1577ca
hex632e

25390 has 8 divisors (see below), whose sum is σ = 45720. Its totient is φ = 10152.

The previous prime is 25373. The next prime is 25391. The reversal of 25390 is 9352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25391) 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, 1260 + ... + 1279.

It is an arithmetic number, because the mean of its divisors is an integer number (5715).

225390 is an apocalyptic number.

25390 is a deficient number, since it is larger than the sum of its proper divisors (20330).

25390 is a wasteful number, since it uses less digits than its factorization.

25390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 25390 is about 159.3423986264. The cubic root of 25390 is about 29.3914424320.

It can be divided in two parts, 253 and 90, that added together give a palindrome (343).

The spelling of 25390 in words is "twenty-five thousand, three hundred ninety".

Divisors: 1 2 5 10 2539 5078 12695 25390