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139641 = 389523
BaseRepresentation
bin100010000101111001
321002112220
4202011321
513432031
62554253
71121055
oct420571
9232486
10139641
1195a07
1268989
134b738
1438c65
152b596
hex22179

139641 has 8 divisors (see below), whose sum is σ = 188640. Its totient is φ = 91872.

The previous prime is 139627. The next prime is 139661. The reversal of 139641 is 146931.

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

It is not a de Polignac number, because 139641 - 25 = 139609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139661) 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, 6 + ... + 528.

It is an arithmetic number, because the mean of its divisors is an integer number (23580).

2139641 is an apocalyptic number.

It is an amenable number.

139641 is a deficient number, since it is larger than the sum of its proper divisors (48999).

139641 is an equidigital number, since it uses as much as digits as its factorization.

139641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its digits is 648, while the sum is 24.

The square root of 139641 is about 373.6856968095. The cubic root of 139641 is about 51.8805195656.

It can be divided in two parts, 139 and 641, that added together give a triangular number (780 = T39).

The spelling of 139641 in words is "one hundred thirty-nine thousand, six hundred forty-one".

Divisors: 1 3 89 267 523 1569 46547 139641