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252500142 = 23131321247
BaseRepresentation
bin11110000110011…
…01100010101110
3122121010100002010
433003031202232
51004120001032
641015542050
76154134006
oct1703154256
9577110063
10252500142
1111a591104
127068a926
134040968b
142576b006
1517279ccc
hexf0cd8ae

252500142 has 16 divisors (see below), whose sum is σ = 508856832. Its totient is φ = 83523960.

The previous prime is 252500119. The next prime is 252500147. The reversal of 252500142 is 241005252.

It is a happy number.

It is a super-3 number, since 3×2525001423 (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252500147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159838 + ... + 161409.

It is an arithmetic number, because the mean of its divisors is an integer number (31803552).

Almost surely, 2252500142 is an apocalyptic number.

252500142 is an abundant number, since it is smaller than the sum of its proper divisors (256356690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252500142 is a wasteful number, since it uses less digits than its factorization.

252500142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321383.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 252500142 is about 15890.2530502192. The cubic root of 252500142 is about 632.0535509156.

Adding to 252500142 its reverse (241005252), we get a palindrome (493505394).

The spelling of 252500142 in words is "two hundred fifty-two million, five hundred thousand, one hundred forty-two".

Divisors: 1 2 3 6 131 262 393 786 321247 642494 963741 1927482 42083357 84166714 126250071 252500142