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139747254 = 2323291209
BaseRepresentation
bin10000101010001…
…01111110110110
3100201221220012020
420111011332312
5241233403004
621511134010
73314555253
oct1025057666
9321856166
10139747254
117197a1a9
123a974306
1322c4c2aa
14147ba42a
15c4068d9
hex8545fb6

139747254 has 8 divisors (see below), whose sum is σ = 279494520. Its totient is φ = 46582416.

The previous prime is 139747253. The next prime is 139747271. The reversal of 139747254 is 452747931.

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

139747254 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139747253) 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, 11645599 + ... + 11645610.

It is an arithmetic number, because the mean of its divisors is an integer number (34936815).

Almost surely, 2139747254 is an apocalyptic number.

139747254 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

139747254 is a wasteful number, since it uses less digits than its factorization.

139747254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23291214.

The product of its digits is 211680, while the sum is 42.

The square root of 139747254 is about 11821.4742735414. The cubic root of 139747254 is about 518.9367500262.

The spelling of 139747254 in words is "one hundred thirty-nine million, seven hundred forty-seven thousand, two hundred fifty-four".

Divisors: 1 2 3 6 23291209 46582418 69873627 139747254