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672139 = 13149347
BaseRepresentation
bin10100100000110001011
31021011000001
42210012023
5133002024
622223431
75466406
oct2440613
91234001
10672139
11419a96
12284b77
131a6c20
14136d3d
15d4244
hexa418b

672139 has 8 divisors (see below), whose sum is σ = 730800. Its totient is φ = 614496.

The previous prime is 672137. The next prime is 672143. The reversal of 672139 is 931276.

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

It is a cyclic number.

It is not a de Polignac number, because 672139 - 21 = 672137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672131) 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, 1764 + ... + 2110.

It is an arithmetic number, because the mean of its divisors is an integer number (91350).

2672139 is an apocalyptic number.

672139 is a deficient number, since it is larger than the sum of its proper divisors (58661).

672139 is a wasteful number, since it uses less digits than its factorization.

672139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509.

The product of its digits is 2268, while the sum is 28.

The square root of 672139 is about 819.8408382119. The cubic root of 672139 is about 87.5964215993.

The spelling of 672139 in words is "six hundred seventy-two thousand, one hundred thirty-nine".

Divisors: 1 13 149 347 1937 4511 51703 672139