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12557225 = 524710687
BaseRepresentation
bin101111111001…
…101110101001
3212121222021102
4233321232221
511203312400
61125051145
7211506662
oct57715651
925558242
1012557225
1170a747a
124256ab5
1327a8815
14194c369
1511809d5
hexbf9ba9

12557225 has 12 divisors (see below), whose sum is σ = 15903744. Its totient is φ = 9831120.

The previous prime is 12557213. The next prime is 12557227. The reversal of 12557225 is 52275521.

It is not a de Polignac number, because 12557225 - 28 = 12556969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4169 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (1325312).

Almost surely, 212557225 is an apocalyptic number.

It is an amenable number.

12557225 is a deficient number, since it is larger than the sum of its proper divisors (3346519).

12557225 is a wasteful number, since it uses less digits than its factorization.

12557225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10744 (or 10739 counting only the distinct ones).

The product of its digits is 7000, while the sum is 29.

The square root of 12557225 is about 3543.6175019322. The cubic root of 12557225 is about 232.4330558412.

The spelling of 12557225 in words is "twelve million, five hundred fifty-seven thousand, two hundred twenty-five".