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252047 = 307821
BaseRepresentation
bin111101100010001111
3110210202002
4331202033
531031142
65222515
72066555
oct754217
9423662
10252047
11162404
12101a3b
138a953
1467bd5
154ea32
hex3d88f

252047 has 4 divisors (see below), whose sum is σ = 253176. Its totient is φ = 250920.

The previous prime is 252037. The next prime is 252079. The reversal of 252047 is 740252.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 252047 - 26 = 251983 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104 + ... + 717.

It is an arithmetic number, because the mean of its divisors is an integer number (63294).

2252047 is an apocalyptic number.

252047 is a deficient number, since it is larger than the sum of its proper divisors (1129).

252047 is an equidigital number, since it uses as much as digits as its factorization.

252047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 252047 is about 502.0428268584. The cubic root of 252047 is about 63.1675225698.

Adding to 252047 its reverse (740252), we get a palindrome (992299).

The spelling of 252047 in words is "two hundred fifty-two thousand, forty-seven".

Divisors: 1 307 821 252047