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139454 = 2721423
BaseRepresentation
bin100010000010111110
321002021222
4202002332
513430304
62553342
71120400
oct420276
9232258
10139454
1195857
1268852
134b623
1438b70
152b4be
hex220be

139454 has 12 divisors (see below), whose sum is σ = 243504. Its totient is φ = 59724.

The previous prime is 139439. The next prime is 139457. The reversal of 139454 is 454931.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139457) by changing a digit.

139454 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 614 + ... + 809.

It is an arithmetic number, because the mean of its divisors is an integer number (20292).

2139454 is an apocalyptic number.

139454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

139454 is a deficient number, since it is larger than the sum of its proper divisors (104050).

139454 is a wasteful number, since it uses less digits than its factorization.

139454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439 (or 1432 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 139454 is about 373.4354027138. The cubic root of 139454 is about 51.8573506514.

The spelling of 139454 in words is "one hundred thirty-nine thousand, four hundred fifty-four".

Divisors: 1 2 7 14 49 98 1423 2846 9961 19922 69727 139454