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2145245 = 5795431
BaseRepresentation
bin1000001011101111011101
311000222201112
420023233131
51022121440
6113551405
724143234
oct10135735
94028645
102145245
111235833
12875565
135a159b
143dbb1b
152c5965
hex20bbdd

2145245 has 8 divisors (see below), whose sum is σ = 2607360. Its totient is φ = 1694160.

The previous prime is 2145239. The next prime is 2145263. The reversal of 2145245 is 5425412.

It is a happy number.

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

It is not a de Polignac number, because 2145245 - 212 = 2141149 is a prime.

It is a super-2 number, since 2×21452452 = 9204152220050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2321 + ... + 3110.

It is an arithmetic number, because the mean of its divisors is an integer number (325920).

22145245 is an apocalyptic number.

It is an amenable number.

2145245 is a deficient number, since it is larger than the sum of its proper divisors (462115).

2145245 is an equidigital number, since it uses as much as digits as its factorization.

2145245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515.

The product of its digits is 1600, while the sum is 23.

The square root of 2145245 is about 1464.6654908203. The cubic root of 2145245 is about 128.9710689683.

It can be divided in two parts, 2145 and 245, that multiplied together give a palindrome (525525).

The spelling of 2145245 in words is "two million, one hundred forty-five thousand, two hundred forty-five".

Divisors: 1 5 79 395 5431 27155 429049 2145245